All 3 Uses

furlong
in
Moby Dick
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A vast pulpy mass, furlongs in length and breadth, of a glancing cream-colour, lay floating on the water, innumerable long arms radiating from its centre, and curling and twisting like a nest of anacondas, as if blindly to clutch at any hapless object within reach.†
Chpt 58-60

furlongs = a unit of length equal to 220 yards (1/8 of a mile)
His tormented body rolled not in brine but in blood, which bubbled and seethed for furlongs behind in their wake.†
Chpt 61-63 *
Not to tell over again his furlongs from spiracle to tail, and the yards he measures about the waist; only think of the gigantic involutions of his intestines, where they lie in him like great cables and hawsers coiled away in the subterranean orlop-deck of a line-of-battle-ship.†
Chpt 103-105

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