Ordnance Survey Old Series one-inch map
Sheet 57NW Tregaron. Surveyed 1819 to 1820 and revised 1833
NLA, 1834, View the fully zoomable and interactive map on the National Library of Australia website
Old series Ordnance Survey maps of England and Wales
Engraved at the Drawing Room in the Tower … by Benjn. Baker & Assistants; printed by Ramshaw.
London : Published by Lt. Col. Mudge, Tower [and later] by Lieu M. Colonel Colby of the Royal Engineers; Sold by Jas. Gardner, Agent for the sale of the Ordnance maps, 163 Regent St., April 18th 1805-1873.
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