Towards the end of May 1900 the writer received as noteworthy a letter and packet of papers as it has been his lot to examine. They came from a good friend of mine, a Dr A. Lister Browne, M.A. Oxon., F.R.C.P., whom, as it happened that for some years I had been living mostly in France, and Browne being in Norfolk, I had not seen during my visits to London. Moreover, as we were both bad correspondents, only three notes had passed between us in the course of those years.