Field Sketch for the Map of Camp at Farmington. This rough pencil sketch of Farmington appears on the verson of a memorandum noting the timetable and distances for the march of the two brigades from Hunt's Tavern to East Hartford, 22-31 October 1782. It provides an unusual example (the only one known to the Editors) of Berthier's rapid on-the-spot notations that he later worked up into finished maps. Other such field sketches were presumably made day by day as a cumulative record of the camps and marches of the army. The training of the topographical engineers emphasized quick and accurate observation in circumstances that precluded the use of regular surveying instruments. The reconnoiterer must then count his own paces, or his horse's, to determine distances from point to point along the road. As he proceeds he must observe and note roughly on his paper "rivers, brooks, canals, bridges, fords, ravines, swamps, mountains, woods, wayside shrines, mills, gallows, and anything else he meets up with." He must sight such distant landmarks as towers, belfries, and windmills in order to establish the direction of the road. And, if time allows, he should also go up into some high building and sketch the surrounding country.