Ingram and the Magna Carta

In The Northerners J. C. Holt discusses the lists of persons who were involved in the rebellion that produced the magna carta. He says that the lists are known to be incomplete, and he cites this passage as an indication that Ingram Boynton was involved even though he was not on the list being discussed.

J. C. Holt (1961) The Northerners, Oxford, p. 38.

Marmaducus de Tweng et Robertus de Monell et Engelr[am] de Boninton habent literas de conductu, duraturo a die Jovis, Nativitatis beate Marie, usque in xv dies sequentes. Teste comite, apud Certeseie, vij die Septembris.

Patent Rolls of the Reign of Henry III, A.D. 1216-1225, For His Majesty's Stationery Office, London, 1901, p. 89.