The paper on Psychical Research is added to the volume for convenience and utility. Attracted to this study some years ago by my love of sportsmanlike fair play in science, I have seen enough to convince me of its great importance, and I wish to gain for it what interest I can. The American Branch of the Society is in need of more support, and if my article draws some new associates thereto, it will have served its turn.
Apology is also needed for the repetition of the same passage in two essays (pp. 59-61 and 96-7, 100-1). My excuse is that one cannot always express the same thought in two ways that seem equally forcible, so one has to copy one’s former words.
The Crillon-quotation on page 62 is due to Mr. W. M. Salter (who employed it in a similar manner in the ‘Index’ for August 24, 1882), and the dream-metaphor on p. 174 is a reminiscence from some novel of George Sand’s—I forget which—read by me thirty years ago.
Finally, the revision of the essays has consisted almost entirely in excisions. Probably less than a page and a half in all of new matter has been added.