The editors of Documents relating to the University and Colleges of Cambridge had no knowledge of John Langton's dispute with Byngham, and they very properly introduced the Godshouse series with Byngham's petition to the king, which it is usual to attribute to the year 1439. The petition, as is customary at that period, does not beara date,but the king's licence of 13 July 1439 was obviously its outcome, and it is reasonable to ascribe to the petition a date late in 1438 or early in 1439 in order to leave adequate margin for the slow motion of the law machinery. Byngham's petition has been printed many times but always directly or indirectly from the same source, the only contemporary copy of the petition known being that still remaining in the muniment room of King's College. It is printed afresh in the appendix, immediately before the royal licence given in answer to it.

It should be noted that the King's College document is not the original petition, as is generally implied, and sometimes specifically stated; the original would be sent to the king and retained. Such petitions occasionally remain amongst the Chancery Warrants, in immediate contact with the warrant for the licence if the prayer of the petition be granted. The warrant has been found in File No. 719 (4921 A), and runs: