The veneration of Winifred and the associated cults of Beuno and Elerius seems to have been of increasing importance throughout this period. It was in the time of Stevens or Prestbury that John Mirk, Prior of Lilleshall, composed his sermon for St Winifred's day, part of his much-copied and later printed "Festial". The chronicler Adam of Usk, after recording the death and burial of Owain Glyndŵr, noted that: "The king, with great reverence, went on foot in pilgrimage from Shrewsbury to St Winifred's well in North Wales." This journey is not recorded elsewhere but seems to have been in about 1416, and was probably the occasion of Henry V's proposal to install a chantry in honour of the saint at Shrewsbury. Nothing further was done until 1463, when Abbot Thomas Mynde was allowed by the Pope, in response to a letter from his predecessor Abbot Ludlow, to earmark the tithes of Great Ness for the project, with the proviso that enough remain to support a vicar in the parish. By the time the permission arrived, the Yorkists were dominant and it was not until 1487 that Mynde was able to mobilise resources for the purpose. In line with the late medieval trend towards mobilising lay initiative for such work, he set up a guild of men and women to service the chantry. Two years earlier Margaret Beaufort, Henry VII's mother, had rebuilt the shrine at Holywell; William Caxton had printed a translation of Robert of Shrewsbury's life of Winifred. Despite this late flowering of piety and pilgrimage, however, the abbey was entering on difficult times.