Delayed answering JH's letter until HH could find details of works by 'Göttingen Professor,' but has had difficulty in locating them. Any treatise connecting epidemics with fungous origins would be of interest. Will bring distressing medical case to attention of one of HH's committees. HH's Medical Notes and Reflections, 3rd edition (1855).

Comments on JH's paper on Sensorial Vision (1858). Covered some of this ground in HH's own book, Mental Physiology (1852).

Invites JH to dinner if possible, or later if not at present possible.

Grateful for JH's translation of J. C. F. Schiller's 'The Walk.' Comments on several points in the translation.

Hopes JH will accept enclosed little volume.

Thanks JH for mentioning HH's paper. Attributes electrical phenomena to 'a material element,' perhaps a modified form of ether, distinct from other matter.

HH has nominated JH's son Alexander to fill a post become vacant by the death of Robert FitzRoy.