This collection consists of the financial records of the Thatcher Brothers Banking Company, the Hyrum State Bank, West Cache Bank, and the First Security Bank of Logan. The collection consists of nearly 170 ledgers and three boxes of various papers, which contain financial information on Logan's first bankers, George W. Thatcher, Sr. and Moses Thatcher, Sr. In addition, since the Thatcher Bank was the only bank in Cache Valley from 1883-1892, these records contain extensive financial information on Cache Valley's residents and businesses during this time period. Although boxes 1 and 2 (and many of the ledgers) in this collection contain correspondence, researchers should also see COLL MSS 47: George W. Thatcher, Sr. Papers, which contain a substantial amount of early business correspondence for the Thatcher Brothers Banking Company.

This collection is organized into three sections, section I (the majority of the collection), contains records from the Thatcher Brothers Banking Company, section II contains 13 ledgers from the Hyrum State Bank, and section III contains two stock ledgers related to the West Cache Bank. boxes 1-3 contain incoming and outgoing correspondence, bank employee payroll, historical information about the bank, small ledgers, account books, deeds (one relating to the Brigham Young College, Logan), and various other papers. The ledgers contain a record of the minutes of the board of directors, daily transactions, savings accounts, stock purchases, safety deposit boxes, deeds, power of attorney, outstanding loans, and other various books, such as a day book connected to the Brigham Young College (Bk 138). Although boxes 1-3 and the ledgers from section I primarily contain materials connected to the Thatcher Brothers Banking Company, they also contain a small amount of material from other Cache Valley banks.