Ordnance Survey 25-inch to the mile scale maps, 2nd edition, covering all of the Union except Ystradyfodwg; Union, rural and urban district boundaries marked in water colour

Scope and Content

O.S. sheets:

27.11, 12, 15, 16;

28.13;

35.2, 3, 4, 6, 7, 8;

36.1, 2, 5, 6, 9, 10, 13, 14;

41.4, 8, 12;

42.1, 2, 5, 6, 10

[sheets 27.10, 27.14 and 35.12, similarly marked, are located with the main series of Record Office Ordnance Survey maps]