Well I was making a very serious point about the suitability of the area South of the Thames as a Roman military encampment prior to human settlement around the river especially considering that they would have known that the local timber was unsuitable for the type of Castra they would have needed. It?s really not my fault if people have a rubbish knowledge of the cartographical advancements made by the Roman military in the 5 or so decades after Caesar?s conquest of Gaul. I ask you.