This letter, I may say, astonished me. I think it would astonish anybody. A profound and enveloping melancholy succeeded to this feeling of astonishment. At the time, I was engaged in putting the finishing touches to The Tiger in the House and I postponed meditation on Peter's affair until that bulky volume could be dispatched to the printer. That happy event fell on March 15, 1920, but my anthology, Lords of The Housetops, next claimed my attention, and then the new edition of Interpreters, for which I had agreed to furnish a new paper, and the writing of this new paper amused me very much, carrying my mind not only far away from cats, which had been occupying it for a twelvemonth, but also away from Peter's request. At last, Interpreters was ready for the printer, but now the proofs of The Tiger began to come in, and I may say that for the next three months my days were fully occupied in the correction of proofs, for those of Lords of The Housetops and Interpreters were in my garret when the proofs of The Tiger were not. Never have I corrected proofs with so much concentrated attention as that which I devoted to the proofs of The Tiger, and yet there were errors. In regard to some of these, I was not the collaborator. On Page 240, for instance, one may read, There are many females in the novels of Emile Zola. My intention was to have the fourth word read, felines, and so it stood in the final proof, but my ambition to surmount the initial letter of Zola's Christian name with an acute accent (an ambition I shall forswear on this present page), compelled the printer to reset the line, so that subsequently, when I opened the book at this page, I read with amazement that there are many females in the novels of Emile Zola, a statement that cannot be readily denied, to be sure, but still it is no discovery of which to boast. It was not until September, 1920, that I had an opportunity to seriously consider Peter's request and when I did begin to consider it, I thought of it at first only as a duty to be accomplished. But when I began searching my memory for details of the conversations between us and had perused certain notes I had made on various occasions, visited his house on Beekman Place to look over his effects and talk with his mother, the feeling of the artist for _inevitable_ material came over me and I knew that whether Peter had written me that letter or not, I should sooner or later have written this book about him.