The Chicago Manual of Style Online 14.242: Letters and the like in private collections

14.240:
Examples of note forms for manuscript collections 14.241:
Examples of bibliography entries for manuscript collections 14.242:
Letters and the like in private collections 14.243:
Websites and blogs—overview 14.244:
Titles for websites and blogs

14: Documentation I: Notes and Bibliography

Chapter Contents» Unpublished and Informally Published Material» Manuscript Collections

14.242Letters and the like in private collections

Letters, memoranda, and such that have not been archived may be cited like other unpublished material. Information on the depository is replaced by such wording as “in the author’s possession” or “private collection,” and the location is not mentioned.