Medium: Pen and ink on paper
The absence of hill sketching on this drawing suggests it is an incomplete or 'rough' copy. A triangulation diagram appears on the reverse. This enabled the draughtsman to plot prominent features of the landscape. Major lines of communication are coloured yellow, following standard military cartographic convention. Notes in the margins of the drawing record the date it was received at the "Ord[nance] Map Office" and that it has been reduced and drawn for the engravers. Drawings were reduced to a scale of one inch to the mile for the final engraved sheets.