from The description and use of the carpenters-rule together with the use of the line of numbers (inscribed thereon) in arithmatick and geometry. And the application thereof to the measuring of superficies and solids gaging of vessels, military order interest and annuities: with tables of reduction, &c. published in 1656. This is the fronticepiece engraved by Richard Gaywood.
Here is John, surrounded by a selection of geometric objects brandishing his carpenters rule. His coat is decorated with tapes or braid that extend outwards from the buttons at the centre and his sleeves are open at the seam to show his shirt sleeves. His breeches are full and gathered at the knee and his hose quite wrinkled at the heel. He has a stout pair of shoes and a wide brimmed hat. Nice big bushy beard too!