Kautilya's Arthashastra 2.30.37

2.30.37

kāṅko vārikāṅko māyūro 'rdhamāyūro nākulordhanākulo vārāho 'rdhavārāhaś ceti dhoraṇaḥ //

Flying like a vulture (kánka), dashing like a water-duck (várikánaka), running like a peacock (máyúra) halt the speed of a peacock (ardhmáyúra), dashing like a mangoose (nákula), half the speed of a mangoose (ardha-nákula), running like a hog (váráha) and half the speed of a hog (ardha- váráha) are the several forms of gallop.