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This plan of the north side of the Thames shows Barking and Ilford to the left, on the banks of the Roding, and Rainhham and Hornchurch to the right. A patchwork of field boundaries dominate the landscape, with open dotting depicting unproductive enclosed land. Pencil lines intersect across the plan, recording the angular measurements taken by the surveyor to calculate the distances between fixed points in the landscape.
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This rough field sketch, or 'foul' copy, was produced on several pieces of irregularly cut paper joined together and laid on the verso of the triangulation map for southern England. Covering the north side of the Thames, East Ham and Ilford are to the left, and Rainham to the right. The drawing is dominated by a patchwork of field boundaries, with open dotting indicating unproductive enclosed land. The detail recorded here was incorporated in the 'fair' map OSD 132, titled 'Barking'.