The affairs of Ellenbog's family often appear. His father had been a great collector of books, which he had corrected with his own hand, and which at his death he had wished to be kept together as a common heirloom for the whole family. A great many of them were medical, and therefore it had seemed good that the enjoyment of the books should go to Ulrich, the son who was studying medicine at Siena. On his way home, after completing his course, Ulrich died; and Nicholas composed a piteous appeal on behalf of the books, bewailing their fate that after ten years of confinement their hope of being used had come to nothing. Onofrius was the only brother from whom might be hoped a younger generation of Ellenbogs, one of whom might study medicine. Elizabeth's children were Geslers, and so apparently did not count. How long the books were kept together is not known. One of them is now in the University Library at Cambridge, and has been excellently described in an essay by the late Robert Proctor. It consists of several volumes bound together: Henry of Rimini on the Cardinal Virtues, the Journey of a penitent soul through Lent, a treatise _de diuina predestinacione_, and John Peckham, Archbishop of Canterbury, _de oculo morali_--all of a definitely religious or moral character. They are freely annotated by the father's hand, with marginalia which throw light on his life and times, his dislike of the Venetians for their anti-papal policy, his experiences as physician to the Abbey of St. Ulrich in Augsburg, and the part that he played in the introduction of printing there. On Lady Day, 1481, shortly after Nicholas' birth, perhaps when he had lived just a week and seemed likely to thrive, the father composed an address to his four living sons--four being already dead--, and wrote it into this volume. He adjures them to follow learning and goodness, and finally bids them take every care of the books; and not let them be separated. This it was which inspired Nicholas' appeal thirty years later, when Ulrich, the son, was cut off, just as his eyes seemed about to follow his father's up and down the pages.