This was the most ambitious piece of typographic design and printing produced to date by the Press. The intention was that the texts should be austerely and simply printed, so as to be easily read but nevertheless self-effacing in relation to the prints, showing them off to the full. The colophon printed on the last sheet of the portfolio shows the Press's device used for the first time. It is a wood-engraving by Ian Mortimer and is a visual image based on his name: "mort", death; "mer", sea. The use of visual puns and the like was common practice among earlier printers, when devising their press-marks.