A mercer by trade, Chaplain was a freeman of Norwich by February 1414, when he attended a ‘great congregation’ in the guildhall. Another congregation chose him and others to supervise repairs to the city’s walls and towers in July 1421, and he became an auditor and constable during the next two years.
During his mayoralty Chaplain was an active supporter of Wetherby, who had lost his rank of alderman in the wake of the disputed mayoral election of 1433. While mayor, or shortly before his election, he was admitted to the guild of St. George, an institution of which many of Wetherby’s allies were members, and in January 1437 (or so it was later alleged) he attempted illegally to have Wetherby restored to the aldermanry. According to an indictment of September 1439, Chaplain had forced several uneducated citizens (‘ideotos’) to seal a blank charter, declaring that ‘yf ye will not seale it I shal certifye yow for ryseres’, before adding a text asserting that Wetherby was an alderman of the city. Whatever the truth of the indictment, it was not the only charge of misconduct levelled against Chaplain in his capacity as mayor.
The jury that indicted Chaplain for the supposed charter-forging incident also accused him of attacking two men with his sword. Significantly, the alleged assault occurred on 1 May 1437, the day for the election of his successor as mayor. The election was disputed, and it degenerated into a rowdy confrontation between Wetherby and his supporters on the one hand and his opponents on the other. The only account of what happened is contained in a justices’ certification drawn up by Wetherby, Chaplain and others. According to this, Wetherby’s political opponents had assembled a large crowd of rioters to prevent him, his supporters and the majority of aldermen and ‘well-ruled’ freemen from attending the election. The certifiers further alleged that the mob had assaulted Wetherby, Chaplain and other leading citizens, that Chaplain (who remained mayor until the following month) and the city’s j.p.s had dared not, ‘for dred of ther deth’, arrest the wrongdoers, and that a jury was too terrified to indict them. Almost certainly, the intention of these partisan claims was to annul the election of John Cambridge as mayor, for it was necessary to allege riot to overturn an election, and certification was the legal process used in the case of riot.
Chaplain was among several citizens chosen to survey the walls, towers and gates of Norwich for defects in March the following year,
If Chaplain made a will, it has not survived and there is no evidence for any wife or children he may have had. Such information as exists for his private affairs is extremely limited. In the mid 1420s, he and a fellow citizen entered a bond for just over 100 marks to two Suffolk esquires, William Clopton and Thomas Mylde, probably as a security for a commercial transaction.
