Medium: Pen and ink on paper
This drawing plots the estuaries of the Rivers Erme and Avon on the south Devon coast. The survey date is noted at the bottom right of the manuscript, along with the scale. The draughtsman is unknown, but the elaborate hill-shading and attention to communications routes conform to the military and cartographic standards employed in the overall survey. Square gridlines in pencil are visible at the boundaries of the map, made to facilitate copying.