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This drawing is formally titled. Its scale is noted and the surveyed area recorded as 205.6742 square miles. Archaeological sites are named in gothic script. Colour washes depicting relief are combined with numerical annotations ('spot heights') in red and black ink giving the heights of the hills. Figures in red represent trigonometrically ascertained altitudes whereas those in black are estimates. On the top left margin a note, dated 1st April 1822, from draughtsman Robert Dawson reads: "Cws yr ychen Bannog, is an ancient Bank said to run from sea to sea. It could not be traced in this survey beyond Carn Cron. The Rev John Williams of Ystrad Meyric supposes it may be a British Road, or a Boundary between two tribes of the Britons".