But this final act, like so many that Sir John had undertaken in the course of his life, was left undone. A dispute with the Duke of Suffolk in the year 1479 made it necessary for him to visit London in spite of the epidemic of sickness that was abroad; and there, in dirty lodgings, alone, busy to the end with quarrels, clamorous to the end for money. Sir John died and was buried at Whitefriars in London. He left a natural daughter; he left a considerable number of books; but his father's tomb was still unmade.