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Hansen's memoir on the perturbations of the small planets.

Letter from Hansen to G.B.A. in Monthly Notices R.A.S. Nov. 8 1861. Hansen's memoir on the perturbations of the small planets: where he is wrong; where the translation is at fault.

Acknowledgement of paper on Hansen's theory. AC's treatment of Lunar theory by method of variation of elements is new; outlines the possible difficulties. JCA is applying this method to the secular inequalities of the moon's mean motion, further to paper in PTRS, 1853.

Acknowledgement of copy of paper on Disturbing functions. Origin of error of Hansen's. Agrees to look at remainder of development of [omega].

Hansen's lunar tables. Transcript from Airy's correspondence files in RGO Archives, copied for D.MacAlister 1893-1894.

[JCA's comments on De La Rue's speech on awarding Gold Medal of RAS] Acknowledges copy of Hansen's letter sent. Disagrees with H's assertion that he never contested JCA's theory of the secular acceleration of the moon: H caused LeVerrier to attack JCA and Delaunay, and is now adapting his own theory without admitting it might be wrong.

Comments on De La Rue's speech on awarding Gold Medal of RAS to JCA. Whether a quotation from Herschel should be included. Whether LeVerrier should be mentioned in light of his and Delaunay's part in the controversy over the secular variation of the moon's mean motion. Accuracy of Hansen's and Plana's theories. Encloses copy of Delaunay's letter.

Incomplete. [JCA's comments on De La Rue's speech on awarding Gold Medal of RAS] Theory of moon: where work of Plana and Damoiseau is incorrect and how it might be improved. Errors of Hansen's ditto. Plana's original reception of JCA's theory of the moon.

Knobel's Table of comparisons of Greenwich Observations and Hansen's tables. Letter or extract of letter transcribed for quotation in MacAlister's biography. Possible that this particular item is JCA's own file copy.

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.