Again, we find 1000 as the limit; or perhaps 10,000; and sometimes the savage carries his number system on into the hundreds of thousands or millions.

Indeed, the high limit to which some savage races carry their numeration is far more worthy of remark than the entire absence of the number sense exhibited by others of apparently equal intelligence.

If the life of any tribe is such as to induce trade and barter with their neighbours, a considerable quickness in reckoning will be developed among them.

Otherwise this power will remain dormant because there is but little in the ordinary life of primitive man to call for its exercise.
In giving 1, 2, 3, 5, 10, or any other small number as a system limit, it must not be overlooked that this limit mentioned is in all cases the limit of the spoken numerals at the savage's command.

The actual ability to count is almost always, and one is tempted to say always, somewhat greater than their vocabularies would indicate.