John Mirfield, a canon of St. Bartholomew's Priory, wrote a general treatise on medicine, entitled _Breviarium Bartholomei_, about the year 1380, when Richard Sutton was master of the hospital. This book is of considerable interest, both as an early medical treatise written at a time when this form of literature was not general, and for its connection with the hospital. Dr. Moore gives a full description of the contents, and adds: 'The picture is complete of the medical and surgical practice in St. Bartholomew's Hospital in the reign of Richard II.'[154] London was doubtless well able to supply the hospital with patients, and the dismounted knights in the jousts at Smithfield must have found it convenient to have their wounds attended to at once. It is recorded that when Wat Tyler fell from his horse, half dead from his wounds, he was dragged within the hospital gate, and died in what is now the open space between the church and the outer wall of the great hall. The body was then laid in the master's chamber. Walworth, however, had the body brought out and beheaded, the head being sent to London Bridge to replace that of Archbishop Sudbury. By a composition, dated 1373, the master of the hospital was ordered to be presented to the Prior of St. Bartholomew's Priory after election, and previous to presentation to the bishop. The last master was John Brereton, who subscribed to the King's supremacy in 1534. The last prior, Robert Fuller, surrendered the priory to the King in 1540. About the year 1423 the famous Richard Whittington repaired the hospital at his own expense. Little more than a century after this it was refounded by Henry VIII., but with very little pecuniary help from the King. In 1538 the Mayor, aldermen and commonalty of the City of London petitioned Henry VIII. that they might from thenceforth have the order, rule, disposition and governance of St. Mary's Spital, St. Bartholomew's Spital, and St. Thomas's Spital, and the new Abbey at Tower Hill, with the rents and revenues appertaining to the same, for the only relief of the poor, sick and needy persons. In 1544 the King confirmed by letters patent the grant and establishment of St. Bartholomew's Hospital to the master and chaplains, but in 1546 a deed of covenant between Henry VIII. and the Mayor, commonalty and citizens of London respecting the hospital was sealed, by which they came under the rule of the city. It is stated in the deed that 'his Highness of his bountiful goodness and charitable mind was moved with great pity for and towards the relief, aid, succour and help of the poor, aged, sick, low and impotent people.' Additional letters patent were issued in 1547.[155]