Robert Colinson

• Idea rationaria, or The perfect accomptant, necessary for all merchants and trafficquers; containing the true forme of Book-keeping, according to the Italian methode: wherein is first, the introduction to the forme, 244. queries and answers, with instruc
• Idea rationaria, or the perfect accomptant, necessary for all merchants and trafficquers; containing the true forme of book-keeping, according to the Italian methode after which followes a moneth-book, invors-book, factor-book, specie or cash-book; instru
• Idea rationaria, or, The perfect accomptant