The Public Accountants' Default Act, 1850, is a historical piece of legislation detailing the security requirements for public accountants. It defines who qualifies as a public accountant and outlines the procedures for prosecuting both accountants and their sureties in cases of default or loss. This Act also specifies how existing land-revenue recovery laws apply to proceedings involving public accountants. It's a valuable document for legal historians and those researching the evolution of financial accountability regulations.