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This plan of the southern fringes of Snowdonia includes the Manod and Moelwyn mountains. The drawing is formally titled, with the scale of the drawing noted and the area of the land recorded as 188.84 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, indicating the heights of hills. Altitudes shown in red have been trigonometrically ascertained; those in black are estimated.