Syndicate appointed to consider the erection of an observatory at Cambridge. Gives details of passage through the Senate. Was obliged for J. B. Biot's letter of introduction; found his talents and candor delightful. Had estimate from Edward Troughton for instruments for the Observatory. Printing of the examples began yesterday.

Sends specimens of American locust and Hessian fly from Judge [Richard] Peters [(1743-1828)], president of the Agricultural Society of Philadelphia, and seven papers also from Peters on these subjects.

Replies to Roscoe's letter of 18 November. Recovered from the most obstinate bowel complaint he has ever had, which confined him for three weeks. His hard work on [Abraham Rees'] "Cyclopedia", which is now coming to a close, prevents him from saying much on the "sad loss" of the Princess [Charlotte (1796-1817), only child of the Prince Regent]; wonders at possibility of a subscription for a national memorial, as with Waterloo subscription, with a school attached.

Congratulates Roscoe on opening of the Liverpool [Royal] Institution; anxious to see Roscoe's lecture in print; he and Mr Valpy do not know of anyone for the [Classical] tutor. Depending on his engagements accepts Roscoe's proposal [for Smith to lecture on botany]. Coke family "much shocked" by the sudden death of Lady [Elizabeth] Albemarle [(d 1815), first wife of William Charles Keppel, 4th Earl of Albemarle (1772-1849)] at Holkham, [Norfolk, home of Thomas William Coke], from a miscarriage. Glad that Franklin's letters have been published.