Note 2 — Chapter II
Reading edition
"Lake Baikal is about twenty miles from Irkutsk. It is 420 miles in length, its breadth varying from ten to sixty miles. Its average depth is rarely less than 819 ft., but in parts the ground has been touched only at 4500 ft. The natives believe it to be unfathomable."—"Side Lights on Siberia," by J. Y. Simpson.