Mrs. Babbage, still recuperating, wishes to visit Slough. Recent publication of Charles Babbage's book should excite insurance directors. Paper by Mary Somerville was read at R.S.L. last week. Invitation for MH to visit Somervilles at Chelsea. JH admitted to Geological Society yesterday, presided over by William Buckland. Encloses JH's diploma from Royal Academy of Copenhagen. News of MH's London acquaintances.