This collection consists of five boxes containing a mixture of original and photocopied correspondence. Box 1 consists of letters written by Zine S. Whitney addressed to O. F. Whitney. Box 2 consists of letters written by O. F. Whitney addressed to Zina S. Whitney. Box 3 consists of letters written by O. F. Whitney addressed to his parents. Boxes 4 and 5 consist of correspondence addressed to and from Orson and Zine Whitney between their friends, colleagues, and the extended Smoot and Whitney families. In addition, box 5 also contains a genealogy record, notes, and three letters written by Spencer W. Kimball addressed to Emily Smith (the granddaughter of O. F. Whitney) commenting on various letters written to O. F. Whitney.