Letter, from John William Lubbock to Sir John Herschel, dated at 29 Eaton Place Autograph letter signed by sender. Regrets that John Frederick William Herschel in his address to the Royal Astronomical Society should have omitted to mention the names of P. G. le D. Pontecoulant and John William Lubbock in connection with the calculation of the lunar and planetary perturbations. 14 March 1840