The majority of the materials in the book are correspondence, the preponderance of which were sent under the signature of Willis Brown, elected General Manager of the Oregon Prune Association (OPA). An alphabetical index listing letter recipients can be found at the beginning of the volume.
Much of the correspondence was sent to banks to secure funds for future prune orchard planting; to local and “eastern interests” regarding investing in the Association through the purchase of stocks; to stockholders regarding the appointment of agents to help boost membership; and to canning companies regarding the canning and/or drying and evaporating of prunes (e.g. the Salem Canning Company, and the Dallas Canning Company). Brown frequently corresponded with prospective investors as far afield as Cleveland, Ohio and Sioux City, Iowa, and makes frequent references to the “hearty endorsement” of prunes by Dr. J.R. Cardwell, former President of the Oregon State Horticultural Society. A handful of letters in the book were sent by George Brown, who worked in Portland as an attorney and was an elected member of the OPA Examining Board.
Also included are four pages of minutes that discuss the election of the Board of Directors and Examining Board, and several pages of financial records, which include canned goods price lists, freight costs, and the types of fruits shipped and to whom.
Of special note is an exchange between Willis and C. H. Holden of Eugene, who Willis accuses of multiple, unpaid Association-related debts and threatens with arrest (page 245, 254). Additionally, Willis several times references a publication entitled “A Revelation,” which he wrote and published about the growing of prunes in Oregon, and which laid out estimates of income per acre in a prune orchard, and the expected crop increase per year. Unfortunately, no evidence of this publication remains extant.