1826  The English have drawn in Toronto. Trafalgar and Nelson also;--Chingacousy all sorts have got into;--the flankers in Nassagawa.
1833  Many a U.E.'s grant for 200 acres was sold for a horse--and the Flanker's 100 acre right for 20 dollars.
2n. in a palisade fort, a corner building serving as a bastion and as a storehouse and bunkhouse.
1695-6  (1954)  You . . . to whom the Charge of Each Watch is given are to take it Successively one from the Other, and are to watch four Hours, keeping a Man on the No. East flanker, One on the Southwest, one Walking in the Yard and another at the gate not Suffering any to leave Their Post before such time they are relieved.
1779  (1934)  The Flanker in which the Men resides and was in a decaid rotten state I found rebuilding upon a larger scale.
1874  (1910)  [This post was] of the stockyard type, almost square, and with two bastions, or "flankers" as they were generally called on the frontier.