It is something remarkable, that the general plan of the Roman military stations in this island is better known than those of the Saxons and Danes, which in great measure is owing to these latter not making roads of communication between the different places which they fortified. Another reason is, that sufficient attention has not been paid to the subject, especially in some of the northern parts of England, as is evident with respect to the former of these two invaders, from the map inserted in Gibson's Chronicon Saxonicum. An improvement of this has often been wished for; but we cannot expect such an undertaking to have the desired effect, till better search has been made after these kind of remains, and the discoveries made public. With this view, I beg leave to lay before the Society a short account of a few military works of this sort, as yet, I believe, unnoticed by any writer.