Is anyone familiar with the unpublished work of G.F. Dodwell?

Dodwell made a study of gnomons, and in particular of the recordings of the
shadows cast by them. Gnomons can be used with considerable accuracy to
determine the latitude of the observer (the angle between the gnomon and the
line which bisects the longest and shortest shadows) or Earth's tilt (the
angle between the longest shadow and the line which bisects the longest and
shortest shadows). He compared the tilt from "gnomon measurements" with the
formula of 
Simon Newcomb, and found that as they got more ancient the departure between
the two became more & more pronounced.

Is anyone aware of Dodwell's unpublished book, or any reviews of his findings?

Ian Tresman, Editor/Compiler SIS Internet Digest
Society for Interdisciplinary Studies (SIS)
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