 Between 1815 and 1817 he erected a new mill, the "Clock Mill", at the Three Mills, decorated with an inscription bearing his initials "PM".Metcalfe was noted for his benefactions to charity, he had erected at Hawstead in 1811 the Alms House for "the benefit of the Aged and Deserving Poor".Metcalfe was mentioned with his associate and kinsman James Baker and Jesse Ramsden in the correspondence between Abraham Pilling and Evan Nepean.