212 OBITUARY NOTICES. 



wliicli he has extracted all the references in the diary relating to 

 the Rev. Henry Martyn, and also those giving indications of 

 Miss Grenfell's life and conversation. A verbatim copy of the 

 complete diary was presented by Mr. Jejffiery to the Library of 

 the Royal Institution of Cornwall. 



Since Mr. Jeffery has been residing at Falmouth, he has 

 taken a great interest in the management of the Royal Institu- 

 tion of Cornwall, and of the Royal Cornwall Polytechnic 

 Society, in both of which he has served as an honoured Vice- 

 President. He was also a valued contributor to their Journals 

 It is somewhat remarkable that so abstruse a mathematician 

 should take so much interest in archeeological and topographical 

 history, but we have only to refer to his printed contributions in 

 the Journal of the Institution to prove that his mathematical 

 mind could be brought advantageously to bear on the elucidation 

 of local history, as well as on abstract science. Mr. Jeffery was 

 one of the Secretaries of the Meteorological Committee of the 

 Royal Cornwall Polytechnic Society, and of the Palmouth 

 Observatory, in the success of which he has taken a great 

 interest since its erection in its present position. He was always 

 ready to give most valuable assistance to the superintendent in 

 the initial difficulties of the magnetograph work, a department 

 of the Observatory to which he paid a constant personal attention. 

 Mr. Jeffery also took a considerable interest in the management 

 of the Palmouth Grrammar School. 



Mr. Jeffery was elected a Fellow of the Royal Society on 

 June 3rd, 1880. He was also a member of the British Associa- 

 tion, and of the London Mathematical Society. It was a great 

 delight to him to spend a few weeks in London each year, and 

 he usually chose the months of May or June, so that he might 

 enjoy the pleasure of meeting with his scientific friends at one 

 of the two annual soirees of the Royal Society. 



During the last three or four years, Mr. Jeffery has occasion- 

 ally complained to me, as his intimate private friend, of being 

 subject to much uneasiness, caused by some internal complica- 

 tion, from the effects of which he was frequently troubled with 

 insomnia. But still he remained active and apparently well to 

 the last, often walking from Falmouth to Truro, and even greater 



