This work investigates the operational evolution and strategic influence of the Gillett banking firm within the London money market over a century. R. S. Sayers, a distinguished economic historian, utilizes internal company records and broader financial data to document how the firm navigated the transition from private partnerships to institutionalized banking. The text provides a detailed examination of the firm's adaptation to shifting regulatory environments and the changing mechanics of the British financial system between 1867 and 1967.

Experts recognize this text as a specialized, foundational study of the discount market's development in the nineteenth and twentieth centuries. Readers often note the academic density of the prose, which provides a rigorous look at the technical aspects of banking history.