1 : 31680 The words 'Trig Point' are noted to the far left of the drawing, below Bodney. They indicate points from which angular measurements were taken in order to plot accurately the location of prominent landscape features. The pencil interlining ('hachuring') and shading that indicate relief have been lightly applied, leaving the road network clearly visible. The detail with which the roads are rendered is indicative of the Ordnance Survey's military imperative. Metcalf, Edward B.