Ordnance Survey Scotland County of Wigtown.
Great Britain.Ordnance Survey.
Southampton : Ordnance Survey,
[1843-1938].
Relief shown by spot heights, hachures.
25" County survey 1843-1847, 1st revision 1892-1895, 2nd revision 1906-1907.
Wigtonshire has no 25" mapping prior to 1890s but was surveyed at 6".