A weaver, Justicer was probably a descendant of Michael ‘Justiler’ of Henton, Oxfordshire, who bought a messuage and other property in Wycombe from John Stacy in the late 1360s.
Notwithstanding the purchase made by his putative ancestor, Michael Justiler, in the 1360s, it is possible that Justicer was not a native of Wycombe and that he had moved to the town, a centre for cloth production, to practise his trade. Whatever the case, he was certainly firmly established there before the end of Henry V’s reign. In September 1420 he witnessed the grant of a rent emanating from one of Wycombe’s inns, and in the following summer a Welshman, John Griffin of Cardigan, began a three-year apprenticeship under him.
Justicer survived for some nine years after the dissolution of the Parliament of 1427. In his last will and testament, dated 20 Feb. 1432 and proved on 18 Apr. 1437, he asked to be buried in the churchyard of the parish church of All Saints in Wycombe, beside the tomb of Thomas Sprot, one of its former vicars. He left his son Thomas a tenement in the town’s High Street, a property situated next to another of his tenements in the same street. If Thomas should die without heirs, it was to pass to his second son Richard, with a like remainder to his daughter Matilda. If it came into Matilda’s possession and she died without surviving heirs as well, it was to go to the churchwardens of All Saints, to dispose of for the benefit of the church’s fabric. Justicer provided for his wife Margery by awarding her possession of the tenement in which they lived for life, after which it was to pass to Thomas and his heirs, with the same remainders as before. He also left Margery a tenement lying next to the inn called Le George, for as long as she remained sole after his death: if she remarried, she was to surrender it to Matilda and her heirs. Finally, Justicer left the residue of his estate to Margery, whom he named as his executor, and appointed two overseers, the previously mentioned John Welsbourne and Thomas Durem. The chief beneficiary of his testament was All Saints church to which he donated nearly 20s., for repairs to its fabric, for the purchase of a silver chrismatory, for a new lamp in the choir and for the upkeep of its existing lights.
