Between 1857 and 1863 Petty was involved with work at Hull before the connexion honoured Petty by asking him to assume the governorship of the Elmfield residential schools for boys opened at York early in 1864.
Between 1857 and 1863 Petty was involved with work at Hull where he was behind building the Jubilee Chapel on Spring Bank. Then the connexion honoured Petty by asking him to assume the governorship of the Elmfield residential schools for boys opened at York early in 1864.