Letters patent granted to Thomas Clarke and John Varley for 'An improvement on the atmospheric system of propulsion which is also applicable to other motive purposes'
Melksham Turnpike Trust
Manuscript entitled: "Catalogue of the Apparatus of Philosophical Instruments, in the Collection of Her Late Majesty Queen Charlotte, at the Observatory at Richmond in Surrey"
Temporary staging
Pages 176 and 177 of John Graham's report book 1838-1845
Pages 172 and 173 of John Graham's report book 1838-1845
Pages 166 and 167 of John Graham's report book 1838-1845
Elevation of parts of middle group drawn in plan on No. 127.
Pages 139 and 140 of Alfred Kitching's diary
Pages 137 and 138 of Alfred Kitching's diary
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