Strabo, p.

591.
Plin.iv.c.

12.) which make 875 paces.

It is singular that Gibbon, who in the fifteenth note of this chapter reproaches d'Anville with being fond of supposing new and perhaps imaginary measures, has here adopted the peculiar measurement which d'Anville has assigned to the stadium.
This great geographer believes that the ancients had a stadium of fifty-one toises, and it is that which he applies to the walls of Babylon.

Now, seven of these stadia are equal to about 500 paces, 7 stadia = 2142 feet: 500 paces = 2135 feet 5 inches .-- G.