There were several editions of Richard Dafforne's book. The second edition was published in 1636. The third edition was published in 1656. Another edition was published in 1684. The book is very complete in how it describes scientific accountancy. It contains a lot of detail and explanation. The science that supports accountancy was liked by many people in the seventeenth century. This is supported by the fact that there were so many editions. Starting at this point in history, there have been many books written about accountancy. Many authors claim to be professional accountants and teachers of accountancy. Because of this, it shows that there were professional accountants who were employed in the seventeenth century.