is speculatively attributed to Crowley by Barbara Johnson in Reading Piers Plowman and The Pilgrim's Progress: Reception and the Protestant Reader (Southern Illinois University Press, 1992). Vita fratrum medicantium is a lost medieval text that was printed around 1550, perhaps with Crowley's involvement. In his catalogue John Bale names Peter Pateshull as its author and R. Kylington as the translator. Pateshull was an Augustinian divine at Oxford c.1387, whom Wycliffe had persuaded to preach against the Augustinian friars. His text is a commentary on Hildegard of Bingen's prophecy against friars, which was enshrined as proto-Protestant lore in Foxe's Actes and Monuments. Next came Crowley's three editions of Piers Plowman in 1550, as well as an edition of the prologue to John Wycliffe's translation of the Bible, which was written by John Purvey and wrongly attributed to Wycliff by Crowley on John Bale's authority. A 1540 recension of this text had been printed as: The dore of holy scripture. Crowley's version contains a signed note "To the reader". A running head reads: "The pathwaye to perfect knowledg", and Crowley's title page for the book reads: "The true copye of a prolog wrytten about two C. yeres paste by Iohn Wycklife (as maye iustly be gatherid bi that, that Iohn Bale hath writte[n] of him in his boke entitlid the Summarie of famouse writers of the Ile of great Brita[n]) the originall whereof is founde written in an olde English Bible bitwixt the olde Testament and the Newe. Whych Bible remaynith now in ye Kyng hys maiesties chamber". Also in 1550 Crowley printed three books by the Welsh scholar William Salisbury (or Salesbury) concerning the Welsh language, some anti-Roman Catholic polemics, and an ancient Welsh precedent for clerical marriage. In 1551 Crowley published a fourth Salesbury text, a Welsh translation of the epistle and gospel readings from the 1549 Book of Common Prayer. In 1551 Crowley printed a poetic work ; its title is: . Two original long poems by Crowley were also printed by him that year: (a political-religious allegory) and . Crowley's status as a printer There is some scholarly disagreement about whether or not Crowley actually operated or managed a press that he owned or leased. On the one hand, Olga Illston's "A Literary and Bibliographical Study of Robert Crowley" (M.A. Thesis, London University, 1953) is the basis for the Revised Short Title Catalogue (STC or RSTC) and current