15 Apr 1809 2nd Assistant Surgeon Ordnance Medical Department.
Malta Apr 1811 Arrived in Malta.
Malta 1812 Assistant Surgeon OMD.
Malta Jan 1813 Left Malta.
In Feb 1813, the Ordnance Medical Department had a total of 24 assistant surgeons and 44 second assistant surgeons. Sanderson was 13th in seniority as second assistant surgeon OMD.
15 Aug 1814 Retired on half-pay.