This book provides a detailed list of the Hertfordshire County Maps, with information on the various printings of each map. It has been of great help in drawing up the section on Hertfordshire Maps, and is essential for anyone wanting to identify different printings of particular maps. However it is probably too specialised for the average genealogist or local historian. It should be noted that it only covers maps of the county - and does not cover strip maps, town maps, or those which cover all or part of several counties on the same sheet, such as pages from more modern atlases.

The dates of the field survey for the first edition of the Ordnance Survey maps