Will follow JH's instructions. Expects to find inst[rument?] at home of Mr. Mowman or at Leicester Square.

Had difficulty with actinometer observations on Etna, but obtained a few. Has just obtained a living in Somerset. Is working for the Encyclopaedia Metropolitana at the moment but hopes to make a set of actinometer observations soon.

Met Mr. Smedley a few days ago and the latter has the impression that JH is to write the article on Heat for the Encyclopaedia Metropolitana. Comments on this and wonders if he can request the articles from JH. Sends letter via Charles Babbage.

Charles Babbage communicated [Edward] Smedley's note requesting JH to write an article on 'Heat' and an Introduction to Physical Science. Appears to be some misunderstanding as JH does not wish to write on Heat, no interest in the subject, but is prepared to write on Physical Optics. When will the latter article be required?

Hears a letter from JH has miscarried. Anxious that JH should write an article on Heat as FL is too busy.

Concludes original letter lost. Impossible to do any further work for the Encyclopaedia Metropolitana. Hopes FL will write the article.

Their letters have missed more than once, and JH's last letter is now at the Return Office. Would like to see this letter to learn JH's views on the article on Heat. Gives own ideas how article should be written, too busy himself, so hopes JH can write it, or does he know any other person?

Hears that the editors of Encyclopaedia Metropolitana have taken exception to JH's plan to write a work on Light for the Cabinet Cyclopaedia. Gives his views why the works should not conflict.