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South Petherwin, Cornwall

South Petherwin, Cornwall

Draughtsman: Dawson, Robert

Medium: Pen and ink on paper

Date: 1808

Shelfmark: OSD 16

Item number: 1

Length: 29

Width: 23

Genre: Map

Map scale ratio: 2' : 1 Mile (1: 31680)

A triangulation diagram covers this whole drawing. This was used to plot the location of significant features around which other topographical details could be added. Trigonometric altitudes are recorded at the summit of inclines, while short disconnected lines are drawn in blue watercolour to represent relief - a technique known as 'hachuring'. Several archaeological sites are recorded on this drawing, although this did not become obligatory until 1816. In the lower section of the map to the left of Upton, a darkened triangular point is marked 'Cheese Wring'. Below this is a stone circle named 'The Hurlers'. Field boundaries are marked, with darker lines indicating the division between cultivated and uncultivated land. A table of figures appears in pencil to the lower right of the drawing. Sealing wax is apparent on the reverse. The paper is watermarked W. ELGAR 1796.

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