Piers and his partner Miss Denny took a house in
Braddan and became active in island society. He was not, however, necessarily able to avoid his old ways, as he is recorded as appearing before the
Deemster along with two others (Major-General Stapleton and Captain Edwards) after they started a fight while part of a theatre audience. He was also recorded, a matter of months after the trial, as fighting a duel with a John Meredith Esq. over a bet made at dinner; Meredith fired early, missing Piers, who "advanced towards him, and ordered him to go down to his knees and beg, for pardon and life". Meredith was later shot dead in another duel by a Mr Boyes or Boyce, one of Piers' seconds. In 1810, it was reported that Piers, still a figure of public interest, had finally shot himself after having "debauched the daughter of a respectable clergyman", but the reports were evidently exaggerated. It was claimed that Piers and Miss Denny - subsequently Lady Piers - were married in May 1815, while still living on the Isle of Man. The marriage was held privately at their home: according to Piers this was because his mother disapproved of the relationship, and he wanted to have the opportunity of explaining the circumstances to her before making the marriage public. This caused problems as there was no evidence of the
special licence of the
Bishop of Sodor and Man, by authority of which the marriage was supposed to have been solemnized, so that the marriage might not have been legal under
Manx law. Lady Piers later testified that "I am quite certain that [Piers] intended to solemnize a legal and valid marriage, as he frequently expressed to me an anxious wish that I might have issue which would inherit his estates". The couple's youngest daughters, Louisa and Florence, took action against Piers' heir, his brother Henry Samuel Piers, to recover the money they claimed due to them as John Piers' legitimate children (Piers' sons were born before the 1815 marriage). They succeeded in their claim to legitimacy, and the case (
Piers v Piers) remains the leading case in English law on the
presumption of marriage. After spending several years on the Isle of Man, Piers returned to Tristernagh, where a house was built for him surrounded by a high wall to keep out his creditors. Despite this construction, he was eventually forced to pay the damages in the Cloncurry suit, with great reluctance. ==Later years==