This fifteenth-century paper manuscript furnishes a unique and important insight into university preaching in the early decades of the century, specifically at Cambridge. Hard to read, and presenting its text in a highly abbreviated form, the volume contains a repertory of 156 sermons that I believe were preached in the academic years of 1417 and 1424–1425. With but few exceptions the sermons follow strictly the order of the Church year as well as the university calendar, with rubrics indicating the beginnings of terms. As a result, pieces de tempore and de sanctis and others for special occasions appear mixed together. All items are nothing but very short sermon notes, recording leading ideas, distinctions, authorities, and images “on the fly,” apparently as they caught the note-taker's attention and interest. The manuscript, however, is not a set of the preacher's original notes but clearly a copy of what the note-taker had heard from the pulpit. The notes for individual sermons vary in length from less than a line to over 114 lines. All bear an indication of the occasion on which they were preached, and nearly all record the sermon thema. Exceptions to the latter practice occur in five instances where the scribe records that a sermon is or was missing (“vacat sermo”), presumably indicating that the sermon either was not given (as in one case “propter pluuiam,” no. 65) or was not available to the scribe.