This letterbook covers the period October 1891-October 1893. Much of the book consists of interoffice correspondence involving Edison; his bookkeeper, John F. Randolph; and his private secretary, Alfred O. Tate. The letters deal almost entirely with financial matters. There are many letters concerning the personal finances of Edison and Mina Miller Edison, including the liquidation of their holdings in the General Electric Co. and the sale and purchase of other stocks and bonds. Some of the letters relate to financial aid provided to family members, such as Samuel Edison and Margaret Stilwell. Included also are correspondence and other documents concerning the costs of experiments, laboratory and company payrolls, Edison's account with the patent firm of Dyer & Seely, and his property at Menlo Park. There are also many routine letters regarding Edison's financial transactions with the German National Bank. The front cover is labeled "From October 19, 1891. To October 28, 1893." The spine is stamped "Letters." The book contains 695 numbered pages and an index. Approximately 15 percent of the book has been selected. Related documents for this time period can be found in LB-051 and in LB-054 through LB-058.