It is not unreasonable to expect the doubling of the population of that valley in another century and its quadrupling in two.
"The French in the Heart of America"
John Finley
Some he had heard of on this run were quadrupling their incomes.
"Command"
William McFee
No path could hold this incline directly, and this one gracefully yields and adopts the usual expedient, ricochetting upward in short, incessant lacings, tracing up in the main the run of the Gave, but often diverted, zigzagging, always mounting, quadrupling the distance while it quarters the angle.
"A Midsummer Drive Through The Pyrenees"
Edwin Asa Dix