This ledger covers the period June 1899-June 1903. As the account book of final entry, it summarizes transactions relating to the cement works at Stewartsville; the company offices in Philadelphia and Camden; and the model of Edison's concrete house at the West Orange laboratory. Included are accounts payable and receivable, sales accounts, and entries pertaining to the quarries, mills, and machinery at Stewartsville. Other accounts relate to experiments, plans, and assays. Numerous entries concern the assessments and payments of individual investors in the company, including Charles A. Coffin, Theron I. Crane, James Gaunt, James Gayley, Harlan Page, William S. Pilling, Willard P. Reid, and Robert H. Thompson. There are also accounts with Edison and with various Edison companies, including the Edison Manufacturing Co., Edison Ore Milling Syndicate, Ltd., Edison Phonograph Works, Edison Storage Battery Co., National Phonograph Co., and New Jersey and Pennsylvania Concentrating Works. The spine is stamped "Ledger No. 1." The front cover is marked "15." The book contains 473 numbered pages and an index; some pages are blank.