Note 4 — Chapter XLII · THE MIDDLE AMUR.

At the entrance of the defile, 783 miles below Ust-Strelka, and on the north bank, is situated the station Pashkof. On the opposite bank rises the bold promontory of Sverbeef, projecting far into the river. From a breadth of two miles the Amur suddenly decreases to 700 yards, the depth in many places reaching to 70 feet, and thus it flows for 100 miles to Ekaterino-Nicolsk. The current sweeps along at the rate of three miles, and in some places attains as much as 5½ miles an hour.