References for the 'Deal Area in Maps' talk are as follows:
1797 Mudge field sketches 3 inch to 1 mile - British Library Online Gallery -
Covers Dover to Sandwich to Eastry, excellent resolution
1815 Modified Mudge map - British Library online Gallery -
Covers inland to Canterbury, but at lower resultion online.
1820 OS East Kent 1 inch to 1 mile - Vision of Britain -
1871 Deal 25 inch to 1 mile. Use the Godfrey edition and a magnifying glass.
Available from Tylers or other book shops very reasonably priced.
1906 OS revision at Deal Library 2500:1 scale