What English polymath was featured with instruments and a Difference Engine prototype at the King George III Museum?
King George III Museum:  The collection of scientific and mathematical instruments assembled by George III, after whom the museum is named, was donated to the university by Queen Victoria in 1841, and the museum was opened by Albert, Prince Consort on 1 July 1843. Charles Babbage: Charles Babbage {'1': ", '2': ", '3': ", '4': "} ( ; 26 December 1791 – 18 October 1871) was an English polymath.
i don't know