Beric the Briton A Story of the Roman Invasion

"They heard from the headman that the whole country near the river was densely covered with bushes, and that the ground was swampy and very difficult to cross. They agreed, therefore, that they would form a strong intrenchment at the spot where they were to embark. It was unlikely in the extreme that the Romans would seek to penetrate such a country, but if they did they were to be opposed as soon as they entered the swamps, and a desperate stand was to be made at the intrenchment, which would be approachable at one or two points only. …"