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Incomplete. See 16/17/1 for another draft of same letter. See 36/18/1 for French translation. Acknowledgement of copies of CD's replies to LeVerrier's attacks on his theory of the moon. Nature of LeVerrier, Hansen's and Plana's errors. M. de Pontecoulant's letter in Monthly Notices of RAS.

See 36/18/2 for French translation. Sends copies of reply to Pontecoulant, Plana etc: one for CD personally, one for the French Academy of Sciences.

See 36/18/3 for French translation. Acknowledgement of CD's calculation of secular acceleration of moon's mean motion by Poisson's method. Thinking of sending four different methods of calculation of same for inclusion in Nautical Almanac. Pontecoulant unlikely to be persuaded of JCA's and CD's method. LeVerrier likely to come to unpleasant discovery of the truth.

Letter of introduction for Pierce. Plana convinced of JCA's and CD's expression of the secular acceleration of moon's mean motion. Hansen and LeVerrier might yet be convinced.

Acknowledgement of copies sent by CD of investigation into Hansen's long inequalities and corrections of LeVerrier's Annales, and CD's volume on the Theory of the Moon. Praise of CD's method.

See 16/19/3 for another copy. Authorisation for CD to publish JCA's expression of coefficient of principal term of the latitude [of the moon?]. Adds equation for principal inequality of the true latitude, and comparisons with Plana and Pontecoulant's results.

Another copy of 16/19/2. Authorisation for CD to publish JCA's expression of coefficient of principal term of the latitude [of the moon?]. Adds equation for principal inequality of the true latitude, and comparisons with Plana and Pontecoulant's results.

Invitation for CD to come to meeting of British Association in Cambridge, Oct 1862, and to stay at the Observatory. Hopes also to be entertaining Airy.

Announcement of Senior Wranglership. Discussion of results: Griffin (JCA's coach) has done particularly well. Smith's Prize examination next.

Has been busy, working on the orbit of the present comet, and on the suspected new planet [Neptune]. College news. Family news.