[Footnote 141: See a learned dissertation of Baier, de muro
Caucaseo, in Comment. Acad. Petropol. ann. 1726, tom. i. p. 425 -
463; but it is destitute of a map or plan. When the czar Peter
I. became master of Derbend in the year 1722, the measure of the
wall was found to be 3285 Russian orgyioe, or fathom, each of
seven feet English; in the whole somewhat more than four miles in
length.]