<p>A postcard sent to Ted Claxton. Showing a map of England and Wales, indicating lime-free areas for health reasons. 
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It is of course nonsense. Herne Bay, for example, is in a hard water area. It took its water at that time from chalk beds, and was full of lime in 1905.
Unknown author<span style="display: none;">Unknown author</span>
1905-03-30
Scan of original postcard in my possession