Henry Michael John Underhill (1855-1920),
an Oxford antiquarian and magic lantern slide painter, had interests which included entomology and microscopy,
the anthropology of folk-tales and British archaeology.
After his death, his papers and slides were donated to various parts of Oxford University. The
painted slides of windmills that he produced to
accompany his 1907 lecture on windmills were amongst the bits of the collection that ended up at the the Institute of Archaeology.
Underhill also did a
photographic survey of Oxfordshire and Berkshire windmills
and those slides are not available online. This and other Underhill windmill material is variously to be found in the
Oxford Bodleian Library, the Oxford Museum of the History of Science, and the Oxford University Department of the History of Art.