The Engineer officers in charge of the operation were Lt-Colonel Thomas Colby, a long-serving Director-General of the Ordnance Survey, and Lieutenant Thomas Larcom.
Thomas Frederick Colby (1784–1852), British major-general and director of the Ordnance Survey
Thomas Jefferson | Thomas Edison | Thomas | Thomas Hardy | Thomas Mann | Frederick the Great | Thomas Aquinas | Clarence Thomas | Thomas Gainsborough | Dylan Thomas | Thomas Pynchon | St. Thomas | Frederick | Saint Thomas, U.S. Virgin Islands | Thomas Carlyle | Frederick II | Frederick II, Holy Roman Emperor | Thomas the Tank Engine | Thomas Moore | Thomas Cromwell | Thomas Becket | Frederick Russell Burnham | Frederick Roberts, 1st Earl Roberts | Thomas the Apostle | Thomas Merton | Frederick Law Olmsted | Thomas Tallis | Thomas Paine | Frederick I, Holy Roman Emperor | Frederick Forsyth |