Book Discount

From June 13 – 20, Legatus Legionis will be discounted to 99c on Amazon in the US and 99p in the UK. The second book in a series, in which science fiction has some real science. Have you got what it takes to actually develop a theory? In the first book in the series, Gaius Claudius Scaevola is asked by Pallas Athene to do three things, before he will be transported to another planet. The scientific problem is to prove the Earth goes around the Sun with what was known and was available in the first century. Can you do it? The answer is given here, but try it first. Following Athene’s prophecy, Scaevola meets the first woman in his life, and ignores her. When Caligulae is assassinated, Scaevola must save Claudius from the attempted Scribonianus coup, then he is given command of Legio XX Valeria for the invasion of Britain. Leaving aside Scaevola’s actions, this is as historically accurate as I can make it, but since the relevant volume of The Annals are lost, there will be inaccuracies, but equally that gives some opportunity to imagine. Amazon link:

KDP Countdown deal: Apologies and what went wrong

To celebrate the release of my ebook, Scaevola’s Triumph, the third in my Gaius Claudius Scaevola trilogy, I arranged (or thought I had) a price reduction over a short period for the first two in the trilogy (Athene’s Prophecy and Legatus Legionis). I went to the US Amazon website, organized the price reductions for between October 3 – 6. Amazon confirmed the reduction. I then went to the UK Amazon, only to find they would not permit it. The reason was that when I published, I set the US price at $2.99, the bottom of the range required for KDP select, and arranged for the other currencies to be set at equivalent prices in local currencies. That, apparently, corresponded to £1.95, the bottom of the range for price reduction promotions in the UK. However, thanks to currency variations, this had slipped to £1.93. I was 2p short. So, I changed the prices there to £1.95, only to find that the promotion in the UK could not now be carried out for 30 days, because this corresponded to becoming a new publication. So, in my advertising, I excluded the UK, and in most of them undertook to give the UK a promotion in due course.

What I did not realize was that this meant that the US Amazon took this as a republication as well, even though nothing had changed and I had not done anything on their site, and they cancelled the promotion. All I can do is apologize. Yes, I could have checked, but really, would you have checked that they had withdrawn what had been agreed without any notification? You would? Good for you. Oh, as another interesting point, US Amazon, having republished (presumably) at my price of $2.99, have raised them to $3.50. The UK Amazon is closer, at £1.99. And they made all that fuss over 2p!

Anyway, all I can say is I am sorry if I have wasted any of your time. I will run the promotion about the beginning of November.

Britain invaded! (2)

In my previous post, I discussed the difficulties of describing the Roman invasion of Britain in my novel Legatus Legionis regarding the sailing, and where the invasion forces landed. The next problem involved what happened next? According to Cassius Dio, the first major battle involved two legions, and was fought near the mouth of a river that the Celts seemed to think would be an obstacle for the Romans. This river is usually considered to be the Medway, although as far as I am aware, there is no physical evidence for this, other than a shortage of alternative rivers. Dio appears to say that the Celts stayed by and large behind fixed defensive walls, but also says there was a battle that lasted two days, which was somewhat unusual for the times. The Romans started proceeding when some Batavians swam the river and scattered the Celtic horses, while some Romans led by Hosidius Geta crossed, and found themselves in deep trouble with the Celts, so much so that Geta had to personally join the line. Dio implies that Geta was a legatus, but I find that very difficult to believe. If a commander joins the line, it means that either the Roman squad was hopelessly outnumbered, and that should not happen if a legion crossed, unless the battle was going very badly. There are no records of a legion nearly being wiped out, so it had to be a smaller squad. But no commander of a legion is going to abandon his legion and go off on an adventure with a small squad, so I assumed that Geta was a Tribune, at least at the time.

The next problem was that Dio is fairly emphatic that two legions were involved in this battle, and one of them was the Augusta under Vespasian. But Vespasian’s main objective was to secure the alliance on the south coast. The nominal reason for the invasion was to support Cogidumnus as a client king. The whole point of the invasion was to govern it after the military force succeeded, and it was general Roman policy to have locals governing, at least in name. Roman power would have the last word, but it was a lot easier if someone would do what they wanted for them. To me, the guiding principle is that Cogidumnus was allying himself with Rome because Caratacus had effectively declared war on him. If Rome did not support such an ally, why would any other Celtic tribe support Rome? In the absence of evidence to the contrary, I believe Vespasian and the Augusta would ensure Cogidumnus and his domain were safe, and in doing that he may well have had to fight a battle. There is real archaeological evidence for a battle well to the south of the Medway, although the dating is not absolute, and it could have been prior to the Roman invasion. My interpretation was that this southern one was due to Caratacus trying to deal with the southern Celts who had allied themselves to the Romans, and Vespasian had to deal with them. What the other two legions fought was the remains of this badly mauled Celtic force plus reinforcements after they retreated north and set up camp. That has the advantage of being in accord with the proposition that Vespasian had a major battle in these early stages, and all legions were involved. I cannot believe that in a major invasion, one third of the force would be absent and doing nothing.

This brings up the major difference between writing a historical novel and writing a history. In a history you can consider all the options. In a novel, things happen, and there is no “half-happening” and no “either or”. Further, everything has to be self-consistent. Then, after having gone to all this trouble, there remains the interesting story to write, because all that has been set so far is the background.

Britain invaded! (1)

In my previous post, I raised the issue of the difficulties in writing a historically based novel when the history is unclear. The second problem I came up with on my ebook Legionis Legatus was with the invasion of Britain. Again, the volumes of Tacitus’ Annals relevant to the time are missing, and much of what we know comes from archaeological work, and from Cassius Dio, who unfortunately wrote a relatively short section on this about 150 years later. Suetonius dismisses the invasion of Britain as “one campaign and that of little importance.” He then says that Claudius gained the submission without a battle or bloodshed. Suetonius is not known for praising Emperors! Further, four legions were involved, and that means it was not a campaign of little importance, particularly as there is clear evidence, including archaeological evidence from excavations, that a number of battles took place. (A deeper consideration of the issues involved can be found in Graham Webster’s The Roman Invasion of Britain (Routledge, 1999) and Leonard Cottrell’s The Great Invasion (Evans Brothers, 1958).)

So, what do we know as opposed to infer? Unfortunately, not much. The start was interesting in that when it was time to board, the Legio II Augusta refused. Why not is unclear, but options include a fear of falling off the world, or, according to Dio, the omens were not propitious. This shows that neither Vespasian (the Legatus) nor the overall commander, Aulus Plautius, had the necessary control. That would never have happened (and it did not) under the first Gaius Julius Caesar. Had it, a cohort would be selected and a decimation ordered. Instead, we know all Plautius could do was to appeal to Claudius. What happened then is that a lot of time was wasted, which may have actually helped the invasion.

Exactly what happened next is unclear. Claudius himself could not come and order the troops because his appearance was too unimposing. He had an awkward gait, he tended to dribble when excited, and he stuttered hopelessly. So instead he sent a freed slave, Narcissus, to try to get the troops to embark. Our only record of what happened next is from Cassius Dio. Narcissus was almost shouted down but there was a cry of Io Saturnalia, everyone burst out laughing, and Vespasian got his troops to board. Now, that is a challenge to fill in the pieces, but I hope I managed.

Where did the invasion fleet go, in the first instance? The short answer is, nobody knows. From what we do know, there is reasonable evidence that at least one legion landed at Rutupiae (Richborough), which would be the closest port to where they embarked, assuming they embarked at Boulogne, which in turn is not exactly firm, but is probable. There is clear evidence of a Roman camp at Richborough, but it does not follow that it was the site at AD 43. We know the Augusta under Vespasian was sent to support the Atrebates and Verica, so it is reasonable to assume that they set off to a port closer to the south coast, and many suggest Lemanae (Lymphne, no longer a port), where again the Romans established a base, although again this may have been later. That left the Valeria, and I have adopted the proposition that they would land at Dubrae (Dover), which is the third possible useful port on the south east coast. There is surprisingly little evidence of exactly where the first landings were, although the description from Cassius Dio of what happened next supports at least the Richborough landing. What we do know is that the invasion force landed essentially unopposed. The reason for this is probably that the Britons did not have a professional army, and when they decided the Romans were not coming, they all went home. One good reason for doing this is that they were essentially farmers, and they needed to get the crops in. Whatever the reason, the Romans got well established and nothing much happened, at least as far as we know, until they decided to march. The initial marching also appears to have been unopposed, apart from the odd skirmish of the “hit and run” type, until the first major battle occurred. That will be the next post’s topic.

From a military point of view, if the Celts wanted to stop the invasion, they lost two great opportunities. Landing troops would be a slow business, thanks to congestion and the lack of maneuverability of triremes, and those at sea could do little to help those on land. The second option was while they were marching through forest tracks, as was shown in the Teutoberg forest. But neither opportunity was taken. That was also something to note while plotting the novel.

Ancient Physics – What Causes Tides? The Earth Moves!

I am feeling reasonably pleased with myself because I now have book 2 of my Gaius Claudius Scaevola trilogy, Legatus Legionis, out as an ebook on Amazon. This continues the story set during the imperium of Caligulae, and the early imperium of Claudius, and concludes during the invasion of Britain. I shall discuss some of the historical issues in later posts, but the story also has an objective of showing what science is about.

In my last post, I showed how the ancients could “prove” the Earth could not go around thy Sun. Quite simply, orbital motion is falling motion, and if things fell at different rates depending on their mass, the Earth would fall to bits. It doesn’t. So, what went wrong? Quite simply, nobody checked, and even more surprisingly, nobody noticed. Why not? My guess is that, quite simply, they knew, it was obvious, so why bother looking? So the first part is showing the Earth moves around the Sun is to have my protagonist actually see three things fall off a high bridge, and what he sees persuades him to check. I think that part of success in science comes from having an open mind and observing things despite the fact that you were not really intending to look for them. It is the recognizing that which you did not expect that leads to success.

That, however, merely permits the Earth to go around the Sun. The question then is, how could you prove it, at the time? My answer is through the tides. What do you think causes the tides? Quite often you see the statement that the Moon pulls on the water. While true, this is a bit of an oversimplification because it does not lift the water; if it did, there would be a gap below. In fact, the vector addition of forces shows the Moon makes an extremely small change in the Earth’s gravity, and the net force is still very strongly downwards. To illustrate, do you really think you can jump higher when the Moon is above you? There is a second point. In orbital motion (and the Earth goes around a centre of gravity with the Moon) all things fall at the same acceleration, but the falling is cancelled out because the sideways velocity takes the body away at exactly the correct rate to compensate. This allowed my protagonist to see what happens (although the truth is a little more complicated). The key issue is the size of the Earth. The side nearest the Moon is not moving fast enough, so there is a greater tendency to fall towards the Moon; the far side is moving too fast, so there is a greater tendency for water to be thrown outwards. There is, of course, still a strong net force towards the centre of the Earth, but when not directly under the Moon, the two forces are not exactly opposed, and hence the water flows sideways towards the point under the Moon. The same thing happens for the Sun. This is admittedly somewhat approximate, but what I have tried to capture is how someone in the first century who did not know the answer could conceivably reach the important conclusion, namely that the Earth moves. If it moves, because the Sun stays the same size, it must move in a circle. (It actually moves in an ellipse, but the eccentricity is so small you cannot really detect the change in the size of the Sun.)

 What I hope to have shown in these posts, and in the two novels, is the excitement of science, how it works and what is involved using an example that should be reasonably comprehensible to all. The same principles apply in modern science, except of course that once the basic idea is obtained, the following work is a bit more complicated.