Click here to skip to content



Draughtsman: Dawson, Robert

Medium: Pen and ink on paper

Date: 1818

Shelfmark: OSD 304

Item number: 13

Length: 37

Width: 30

Genre: Map

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

This drawing shows part of the Cambrian Mountains in north west Wales. An area calculation table survives in black ink in the bottom right margin beneath the formal title. Colour washes depicting relief are combined with numerical annotations of the heights of the hills. The author of the drawing, Robert Dawson, explains that these altitudes were trigonometrically ascertained, "except those distinguished by a note of interrogation, which are only a judgement." One of the best surveyors and draughtsmen, Dawson was employed on the Ordnance Survey for over forty years, also working as an instructor.

Search within this collection

Elsewhere on our websites


Latest events - register free online

Mobile app

For iPhone, iPad and Android

Report a Concern

What is the nature of your concern?

Report a Concern

What is the nature of your concern?

Email link to a friend

Write a brief note to accompany the email

Your friend's email address: