Pioneering British mathematician and mechanical engineer (1791–1871) whose Difference Engine and Analytical Engine are generally acknowledged as the first programmable computers. Third-person ANS signed in the text, “Mr. Babbage,” one page, 3.5 x 2.75, May 15. Note reads, in full: “Mr Babbage will have much pleasure in dining with Mr & Mrs Brunel on Wednesday the 29 Inst.” In fine condition, with lightly trimmed edges and a couple brushes to text. RR Auction COA.