As well as the eleven different sets of blockbook woodcuts, there is a set by Master E. S. in engraving. The lengthy controversy over their respective dating and priority is now resolved by the discovery by Fritz Saxl of an earlier illuminated manuscript, of well before 1450, from whose tradition all the images in the printed versions clearly derive. Studies of the watermarks of the blockbooks by Allen Stevenson at the British Museum in the 1960s confirmed that none of them predated the 1460s, so Master E. S.' engravings are the earliest printed versions, dating from around 1450. The images remain largely the same in all media for the rest of the century.