[Letter] 1839 Aug 14, Admiralty [to] J. Field / W.E. Parry, [asking his opinion of a pair of paddle wheels "on the American principle" for the "100-horse Engines you are now working"]
[Letter] 1839 Aug 14, Admiralty [to] J. Field / W.E. Parry, [asking his opinion of a pair of paddle wheels "on the American principle" for the "100-horse Engines you are now working"]
