I am very glad to find that the ingenious major Rooke has furnished the Society with drawings of that curious remain of very early fortification, the Caers-work (or, as the name was given me, the Carle's-work) near Hathersage in Derbyshire. It was first noticed in print (I believe) in the tour into that country which I ventured to lay before the public this year, but is much better illustrated by the major. If it will not be improper to offer the Society two drawings in addition to those which Mr. Rooke has sent, I will beg you to present them.