Croke was at this time Professor of Greek at Cambridge, but he was compelled to have his work printed abroad, since no English printer of the time possessed a fount of Greek type. Had he acted on his own initiative, he would probably have employed a printer of Paris where he had studied, or Leipzig where he had recently been a professor, both of which towns had excellent Greek presses. But if Siberch, a man presumably with practical knowledge, was already settled in Cambridge, what could be more natural than for the professor to hand over the arrangements of the printing to him, while he in his turn would no doubt entrust the work to a printer of the town from which he himself came, and not improbably to the master with whom he had himself worked. This, of course, is conjecture, but some curious evidence of Siberch’s having been in Cambridge when Croke’s book was published, came to light accidentally in 1889. In that year a volume was found in the library of Westminster Abbey printed at Paris in 1519, which had evidently been bound in Siberch’s workshop. In the binding were several manuscript and printed fragments. The printed fragments consisted of leaves of the Papyrius Geminus printed by Siberch in 1522 and two leaves of a hitherto unknown edition of Lily’s Grammar; amongst the manuscript fragments was a letter to Siberch, to be referred to later, and a piece of the manuscript of Croke’s _Rudimenta Græca_, bearing upon it the rough pencil mark indicating the commencement of a new sheet and a fresh page, both agreeing with the printed book. The copy then had been returned from abroad, not to the author Croke, but to the man who had commissioned the book, Siberch. Had Siberch been abroad when the book was printed, he would either have corrected the proofs with the copy at Cologne, and in that case would hardly have troubled to bring over the then useless copy with him to England, or else proofs with the copy would have been sent to Croke, in which case we should not have expected to find it as waste in Siberch’s shop. What Siberch’s exact position was in relation to the University is not quite clear. Dr Caius speaks of him as the University printer, but no direct evidence of this has been forthcoming. Mr Gray has, however, pointed out to me an entry in one of the Grace books recently printed, and which he was unaware of when writing his life of Siberch for the Bibliographical Society. This was one of the graces passed in congregation during the year from the feast of St Michael the Archangel [September 29], 1520 to the corresponding date of the following year. It runs: “Obligatur doctor Manfeld loco et vice magistri Norres pro summa pecunie quam recepit Johannes bibliopola ab universitate.” This debt is entered regularly in the proctors’ accounts, printed in another recently-printed Grace book, from 1520-21 up to 1524-25, and the sum mentioned is twenty pounds.