the distance a team of oxen could plough without resting.
This was standardised to be exactly 40 rods = 10 chains = 220 yards = 1/8 mile
---
The name furlong derives from the Old English words furh (furrow) and lang (long). Dating back at least to early Anglo-Saxon times, it originally referred to the length of the furrow in one acre of a ploughed open field (a medieval communal field which was divided into strips).
text from Wikipedia, licensed under Creative Commons - Attribution - Sharealike
hat the mother and father, unknown to one another, were dwelling within so many miles, furlongs, yards if you like, of one another.
Charles Dickens. Great Expectations (1861)
---
The Königin Luise's boiler needed to be transported in one piece, and every furlong of its transport had cost the life of a man in the forest.
Cecil Scott Forester. The African Queen, p.13 (1935)
---
A vast pulpy mass, furlongs in length and breadth, of a glancing cream-color, 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.