The English merchants companion: or, An entertainment for the young merchants, their servants. [electronic resource] : Digested into three parts. Wherein the perfect method of merchants book-keeping, ... is compleatly demonstrated. Being the most exact work of this nature, extant. : To which is annexed, Directions for accomptants ... shewing them how to begin, prosecute, and compleatly finish their several functions and offices ... / By Richard Dafforne ..