Aska and Beric had agreed that so long as they were undisturbed they would remain quiet, confining themselves to their borders, except when they sent parties to search for cattle in the woods or to gather up grain that might have escaped destruction in the hamlets, and that they would avoid any collision with the Romans until their present vigilance abated or they attempted to plant settlers in their neighbourhood.

Circumstances, however, defeated this intention. They learned from the Fenmen that numerous fugitives had taken refuge in the southern swamps, and that these sallying out had fallen upon parties of Romans near Huntingdon, and had cut them to pieces. The Romans had in consequence sent a considerable force to avenge this attack. These had penetrated some distance into the swamps, but had there been attacked and driven back with much slaughter. But a fortnight later a legion had marched to Huntingdon, and crossing the river there had established a camp opposite, which they called Godmancastra, and, having collected a number of natives from the west, were engaged in building boats in which they intended to penetrate the swamp country and root out the fugitives.