Encloses a queer pamphlet, which may amuse him, but it has put D. F. J. Arago and others into a towering passion. The public tends to forget one's existence if too long away from London, so hopes that JH will bear this in mind.

Encloses the list in JH's own handwriting. Has placed two silver wires in the eye piece of the micrometer. Will JH secure him some cobweb for placing in the micrometer.