He subsequently gained great reputation by his lectures at Oxford, and before 1440 he became confessor to Henry VI.

He took the Lancastrian side during the wars of the roses, and was captured at the battle of Northampton on 19 July 1460 and imprisoned for a time in Warwick Castle.

He died in the Carmelite house at Ludlow on 11 May 1474, and was buried in Hereford Cathedral, where a beautifully carved alabaster monument with an inscription (printed by Godwin) was erected over his tomb.

Stanbury, who is described as ‘facile princeps omnium Carmelitarum sui temporis,’ is credited by Bale and subsequent writers with twenty-seven separate works, mostly on the canon law, but including also sermons, lectures at Oxford, and theological treatises.

One, entitled ‘Expositio in symbolum fidei,’ was an edition of a work written by Richard Ullerston in 1409, and completed by Stanbury in 1463.