One of the few Winchester merchants recorded as exporters of cloth in the Southampton customs accounts of 1397-8 and 1403, Reson may have come from that port where, earlier on, he had sold the same commodity.
Reson made his will on 3 Oct. 1427, ten days before his third Parliament was due to assemble at Westminster. Apart from his wish to be buried in Winchester cathedral cemetery, its provisions were insignificant and the bequests small. The largest legacies were £1 to William Nightingale, a fellow of Winchester college, to pray for his soul, and goods to the same value to his servant, Alice. Whether he ever attended the House of Commons is uncertain, for he died before 26 Nov., while the first session of the Parliament was still in progress, and the will was proved in London before the examiner general of Archbishop Chichele.
