"Four hundred families [in the Illinois] exclusive of a like number at Post Vincent" [Vincennes].

Americans had then just begun to come in, but this enumeration did not refer to them.

The population had decreased during the Revolutionary war, so that at its outbreak there were probably altogether a thousand families.

They were very prolific, and four to a family is probably not too great an allowance, even when we consider that in such a community on the frontier there are always plenty of solitary adventurers.

Moreover, there were a number of negro slaves.