Dates of the County Series 25″ Maps
Broadly speaking, from the late 1860s up to the mid-1930s the County Series 25″ Maps progressed through just four editions.
The maps emerging from the surveys during 1867-71 can be termed the “First Edition”, although the maps themselves bore no such title.
A quarter of a century passed before the next revision which was undertaken mostly in 1894 and to a lesser extent in 1895; most of the resulting maps bear the official title “Second Edition 1896” but some put 1895.
In the 20th century the first major revision, together with relevelling, was made during 1912-13 to produce a third edition whose maps bear the title “Edition of 1914”. Another twenty years passed before the next revision in 1934, although some revision took place during 1932 as well; this fourth edition bears the title “Edition of 1934”. Some further selective revisions took place before the War, in 1937 for instance, but not such as to define an entire new edition.