Sends some specimens of photographs he has made by using bichromate of potash and an acid solution of nitrate of mercury. Gives details of a luminous phenomena he has seen in the S.W. and would like an explanation of it from JH.

Is grateful for the very interesting photograph; will keep the preparation secret if he discovers it. Has been trying many experiments with benzoates with curious results, but bad weather has stopped progress so has now turned to thermography to test the truth of Mr. Prater's conclusions. Comments on these.

Enclosing the specimens of photographs by different methods; comments on the methods used. Encloses a paper by Were Fox.

Enclosing specimens of his chromatype; comments on how these were produced and their characteristics. Is very busy with the Annual Exhibition of the Polytechnic Society.

Comments on RH's chromatype photographic process and other processes tried by JH.

Has received from the P.M. proof of an article replying to the attack of [L. F.] Moser on RH, also details of a new instrument by J. W. Draper. Would like JH's opinion on the instrument. Has had some good results with the fluorates recently.

Would like his views on a name for the combination of hydrogen and chlorine. Comments on the various theories. Has replied to [L. F.] Moser.

Thanks for his instructive letter. Comments on the terms suggested for the chemical change. Has now improved his chromatype process. Unable to continue his researches on light owing to lack of finance.

Encloses some specimens of photographs made by the use of chloride of gold and bichromate of potash. Comments on the process.

Outlines his domestic history. If JH knows of a suitable position vacant that may suit RH he would be pleased to hear of it. Cannot understand JH's lack of success with the photographic process RH uses. His own book is printed and is waiting for an engraving. Will send him a copy.

Is most grateful for JH's offer of assistance for one of his sons. Suggests the second one would be most suitable. Is certain Sir Charles Lemon, their president, would support him.

Charles Lemon has communicated to him the result of an application made by JH to Prince Albert on behalf of one of RH's children. Is deeply grateful for his assistance.

Sends a copy of G. R. Anson's letter to Charles Lemon regarding a scholarship for one of RH's children. Is deeply grateful to JH for his nomination and support.

Sending some specimens of photographs by a new process that he thinks is unrivalled for simplicity and sensibility. Comments on his method. Has sent an account of another curious process to the P.M. His little boy will go to Christ's Hospital in July or September.

Has just returned from London where he has taken his son, ready to go to Christ's Hospital. Would have called on JH but believed he was not at Collingwood. Hopes to meet him at York. Comment on his recent photographic work. Would like to obtain a position in London.

Returns his interesting specimens. Has read his communication in the Physical and Chemical sections. Regarding the use of certain terms. Had long discussion with W. H. Fox Talbot on matters of Light. Has been offered a position at the Birmingham Institution. Is there any chance of obtaining a position in London?

Received the enclosed silver plate on which is an impression made by the moon; has he any comments. Has been experimenting with solution of bichromate of potash and sulphate of copper exposed to actinic influence. Has been giving his attention to ferrotypes recently.

Has applied to the Council for the position and Michael Faraday has promised him support. Has also heard of a forthcoming vacancy in the Museum of Economic Geology. Is undecided which to apply for and would welcome JH's views.

Has been appointed keeper of Mining records at the Museum of Economic Geology. Hopes to meet him personally and thank him for his assistance.

Expresses his pleasure at RH's new position at the Museum of Economic Geology.