Letter, from Sir John Herschel to Richard Sheepshanks, dated at Collingwood Autograph letter signed by sender. Returns [Max] Weisse's manuscript. He must say something about it and so has swallowed 'whole hog' what Richard Sheepshanks had written about it. Will make a mess [in his the Royal Astronomical Society address] of John Lubbock's work on perturbations. 8 February 1848