John Sinclair Holden (1837 - 1923):
John Sinclair Holden studied medicine at Queen's College, Belfast. He had a medical practice at Glenarm, County Antrim. As a founder member of the Belfast Naturalists' Field Club he took many photographs between 1867 and 1870, showing the antiquities, harbours and geology of the east Antrim coast. He went to live in Sudburn in southern England, where he remained for the rest of his life.