Became Assistant Surgeon to the Wiltshire Militia on May 6th, 1812, and on March 21st, 1814, was gazetted Assistant Surgeon to the 14th Regiment of Foot, with which he was present at Waterloo. He was placed on half pay in 1816 and commuted it in 1830. On leaving the Army he practised at Northampton in partnership with his son, Henry Terry, MRCS, and was for forty years Surgeon to the County Gaol and House of Correction, and for thirty years Surgeon to the Northampton Regiment of Militia. He was also Surgeon Extraordinary to the Northampton General Infirmary. His grandson was Professor Sandford Terry, Professor of History in the University of Aberdeen. He died in retirement at Northampton on Dec 26th, 1873.