Asks JT to persuade Lady Lubbock to change physicians and put herself in the care of Andrew Clark. Thinks this alone will save her.

An invitation to Down for Sunday 16 October.

JT’s tube [of boiled infusion] dated 16 Oct was clear on 19th; on the 20th it was muddy and contained many bacteria in living movement.

Asks JT to send the tubes [of boiled infusions]. Frank Darwin will do his best. Asks for full instructions.

Sends congratulations and a teapot on the occasion of JT’s engagement.

Is pleased JT is not giving up on the spontaneous generation question. Feels strongly that subject will not be clear until it is understood how J. S. Burdon Sanderson and others succeeded in getting bacteria in infusions they had boiled for a long time.

CD has quite given up the marine theory [of Glen Roy] and has accepted glacier lakes. "Nothing makes me gnash my teeth so much as that confounded paper of mine." It is a lesson "never in science to infer one explanation is right because no other one seems possible".

Has read JT’s address ["Science and man", The Times, 2 October 1877, p. 8]. What JT says about CD honours and pleases him. JT’s short character of Faraday is beautiful.

Sends W. K. Clifford subscription.

Has been unwell and hardly able to do anything. Has seen Andrew Clark.

Has observed, perhaps erroneously, that certain plants were excited to movement by a prolonged high note on the bassoon. Would now like to try a siren and asks JT to bring one from the Royal Institution.

Returns the siren; the plants "ill luck to them, are not sensitive to aerial vibrations". Is ashamed of his blunder.

Has been asked to contribute to W. K. Clifford memorial fund. Asks JT’s advice on how much the committee hopes to raise. Would like to give handsomely but feels bound "with such a lot of children, not to be extravagant".

Thanks JT for his information. Sends £50 to the W. K. Clifford memorial fund.