LETTERS FROM THE REV. WM. DERHAM, D.D. 167 Royal Society was the centre of the activities of the latter. John Evelyn, R. Hook, A. Pittfield, John Ray, Sir I. Newton, Sir Hans Sloane, Sir C. Wren, John Lock, the Rev. J. Harris, and many other distinguished men were members and discussed at their meetings matters relating to botany, zoology, physical science, etc., etc., and also published papers called Philosophical Transactions, which contained the results of their researches. No doubt at times their discussions and papers were of a puerile nature, and remind one of the paper written by the im- mortal Mr. Pickwick on "The Tittlebats of the Hampstead Ponds." This was alleged against the Society in 1751, by that remarkable and clever charlatan, Dr. J. Hill, who afterwards called himself "Sir John" ; but however much of truth there was in his satire, it is unquestionable that many even of the early researches and discoveries of the Society were of the greatest service to infant natural science, Darwin and other writers have taught us that no fresh details accurately observed about the workings of nature can be too trivial to be of service in build- ing up scientific knowledge. For this purpose the systematic observation and accurate recording of matters, which at first sight appear unimportant, may not unfrequently be a source of considerable utility to subsequent students of phenomena in nature. In spite of the peaceful nature of the Society's objects, their meetings were not always characterised by that harmony which is proverbially said to be present in "nests of doves," and we get glimpses in the following letters of more than one of those breezes which from time to time ruffled the tranquility of their meetings, and which no doubt caused great jealousies and heart burnings among the learned members, some two hundred years ago. Some of these letters are not dated ; the one bearing the earliest date was written on 8th May 1704, and that with the latest in 1710-1. In addition to the dates an astronomical symbol is sometimes added. There are in these letters constant references to different books, etc., and rather than insert as many footnotes as would be necessary to give the names of their respective authors, and mention , some details about them, I have thought it better to give my explanatory notes in a compact form at the end of each letter.