The deaf mute is sometimes taught in this manner, which is for him an entirely natural manner.

A left-handed child might be expected to count in a left-to-right manner, beginning, probably, with the thumb of his right hand.
To the law just given, that savages begin to count on the little finger of the left hand, there have been a few exceptions noted; and it has been observed that the method of progression on the second hand is by no means as invariable as on the first.

The Otomacs[11] of South America began their count with the thumb, and to express the number 3 would use the thumb, forefinger, and middle finger.

The Maipures,[12] oddly enough, seem to have begun, in some cases at least, with the forefinger; for they are reported as expressing 3 by means of the fore, middle, and ring fingers.

The Andamans[13] begin with the little finger of either hand, tapping the nose with each finger in succession.