‘Account of the proceedings of the Cambridge Philosophical Society at their meeting of March 18, 1867, with a few reflections suggested by those proceedings.’ Manuscript with alterations and annotations, written 20 March 1867.
Together with a letter from Herbert W Turnbull (whose father, W P Turnbull, wrote the account) to Professor Baker, 4 September 1926, in which he says the paper was ‘read I think at an Essay Society known as the Parallelepiped, which consisted of six members, including W K Clifford, Moule (late Bishop of Durham), my father and three others. You were interested in the extract from this printed in my book on my Father’.