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 OMD 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.