Margaret's cold developed into serious fever, similar to those of Isabella and Mrs. Stewart. Financial transactions. Visited Duke of Wellington yesterday with Wolryche Whitmore on behalf of Charles Babbage. Fears Babbage's case will not go well. James Grahame is in London. Mrs. Stewart asks if Isabella and her maid Catherine may stay at Slough. Received visits from Somervilles, Katers, and Dunlops. Death of Thomas Young.