For anyone interested in gay kink, especially erotic bondage with a generous helping of masochism, the Marquis drawings will almost certainly hit the spot. Though we know almost nothing about the artist, there is no doubt that his artistic skills are considerable, which suggests at least a little training.

The sequence of images goes from individual bondage scenarios, frequently involving posts, gates and wooden horses, through a series of master–slave encounters, to a set of circular images which bear an uncanny lineage with Leonardo da Vinci’s famous 1490 drawing L’uomo vitruviano, or Vitruvian Man.