Sorrow of Mrs. Stewart [at death of Isabella]. JH has not seen much of Captain [John] Franklin, who arrived ill. JH's contest with Duke of Sussex for presidency of R.S.L. JS's invitation to visit India has rekindled JH's desire to study southern skies. Wanted once to move to Paramatta. Is considering Cape of Good Hope, and possibly visiting India to view Himalaya mountains. Will send copies of JH's Prelim. Discourse. Answers JS's questions about Babbage's Engine.