 Colonel Goldie, Assistant Adjutant General and Major Waldron of the Royal Artillery, and Captain Dopping-Hepenstal of the Royal Engineers carried through the plan.The pigeon post between look-out stations at lighthouses on islands and the mainland at the citadel in Halifax, Nova Scotia provided a messenger service from 1891 until it was discontinued in 1895.The pigeon post faced a heavy mortality among the pigeons as many were lost on the operations.