Asks TM to set JH's chronometer and barometer.

[Writing to Charles Grant, Baron Glenelg, British Secretary of State for the Colonies], JH advises on such aspects as the administration, staffing, and the form and content of the instruction at the newly established Government Free Schools at the Cape.

Packing to leave Cape. Desires only furnished lodgings, not new house, for month of May in London. [Letter continues 6 May 1838 on board Windsor :] Becalmed off France. Expect to land in Portsmouth and visit Anstey on way to London.

Final arrangements before JH and family depart for England.

Thanks for specimens of [light] 'sensitive paper.' Praises it. JH has handed over all his specimens of photography to R.S.L. Recommends a paper by the chemist Henri Regnault.

Thanks for photographic specimens WT sent. Reports on JH's recent experiments, including some using lenses, in photography; comments on WT's experiments and on the process of patenting.