To double upon

Double Dou"ble, v. i. 1. To be increased to twice the sum, number, quantity, length, or value; to increase or grow to twice as much. [1913 Webster]

'T is observed in particular nations, that within the space of three hundred years, notwithstanding all casualties, the number of men doubles. --T. Burnet. [1913 Webster]

2. To return upon one's track; to turn and go back over the same ground, or in an opposite direction. [1913 Webster]

Doubling and turning like a hunted hare. --Dryden. [1913 Webster]

Doubling and doubling with laborious walk. --Wordsworth. [1913 Webster]

3. To play tricks; to use sleights; to play false. [1913 Webster]

What penalty and danger you accrue, If you be found to double. --J. Webster. [1913 Webster]

4. (Print.) To set up a word or words a second time by mistake; to make a doublet. [1913 Webster]

{To double upon} (Mil.), to inclose between two fires. [1913 Webster]