*The editorial procedure of the monumental edition of The Papers of Thomasr Jefferson, now being prepared at Princeton by Julian P. Boyd, Editor, and Lyman H. Butterfield and Mina R. Bryan, Assistant Editors, calls for the annotation of various Jefferson letters and documents so as to clarify personal, political, and literary allusions. There are natural and physical limits to the amount of annotation feasible, but the Editors plan to go as far as possible in approaching these limits for the convenience of the scholar and the general reader. In the case of certain letters and documents of particular significance or of a controversial nature, an adequate commentary would require many pages of fact and hypothesis. The Editors have therefore decided, in many such cases, to prepare short articles and to encourage other scholars to prepare such extended commentary on documents of this type with the hope that they can be published in scholarly journals. Such manuscripts will be annotated in The Papers of Thomas Jefferson merely with a footnote summary of the conclusions reached in these extended comments. This account by Mr. Butterfield and Mr. Rice of the Jefferson-Cosway note is one of the first of the articles to be published under this policy. Mr. Rice is the representative in France of the Editorial Board. 1 It was located by Mr. Felix Ansermoz-Dubois, who, with the kind permission of the owner, transmitted a photostat to Mr. Rice. Mr. Geigy-Hagenbach states that he acquired the letter about thirty years ago from a dealer no longer in business. It is probably the first of two Jefferson items recorded in A. J. Herbert, Autograph Prices Current, London, V (August, i919, to July, i92i, inclusive), io6, described as follows: JEFFERSON, Thomas.-A. L. i p. 8vo, to Mrs. Maria Cosway, the miniature painter, and endorsed by her as written with his left hand.-Signature, right-hand, with two portraits. These two items were sold, June 2, i92i, to Rimell for JI/5s, at Puttick & Simpson's sale of the library of Sir John Arthur Brooke, Bart. No other Jefferson or Cosway manuscripts are recorded for this sale. Probably the second of the two items, the Jefferson signature, is the one reproduced in Album von Handschriften Beriihmter Persdnlichkeiten vom Mittellter bis zur Neuzeit, Herausgegeben von K. Geigy-Hagenbach, Verlag Rudolf Geering, Buchantiquariat (Basel, I925), 39.