Document
St. Asaph
This plan of a section of the Vale of Clwyd 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 height of the hills. The altitudes shown in red ink have been trigonometrically ascertained; those in black are estimated.
The British Library1819