The tide of adventure set eastward across Siberia at the very time (1579) Francis Drake, the English freebooter, was sacking the ports of New Spain on his way to California. Yermac, robber knight and leader of a thousand Cossack banditti, had long levied tribute of loot on the caravans bound from Russia to Persia. Then came the avenging army of the Czar. Yermac fled to Siberia, wrested the country from the Tartars, and obtained forgiveness from the Czar by laying a new realm at his feet. But these Cossack plunderers did not stop with Siberia. Northward were the ivory tusks of the frozen tundras. Eastward were precious furs of the snow-padded forests and mountains toward Kamchatka. For both ivory and furs the smugglers of the Chinese borderlands would pay a price. On pretence of collecting one-tenth tribute for the Czar, forward pressed the Cossacks; now on horseback,--wild { 295} brutes got in trade from Tartars,--now behind reindeer teams through snowy forests where the spreading hoofs carried over drifts; now on rude-planked rafts hewn from green firs on the banks of Siberian rivers; on and on pushed the plunderers till the Arctic rolled before them on the north, and the Pacific on the east.[1] Nor did the seas of these strange shores bar the Cossacks. Long before Peter the Great had sent Vitus Bering to America in 1741, Russian voyagers had launched out east and north with a daredevil recklessness that would have done honor to prehistoric man. That part of their adventures is a record that exceeds the wildest darings of fiction. Their boats were called _kotches_. They were some sixty feet long, flat bottomed, planked with green timber. Not a nail was used. Where were nails to come from six thousand miles across the frozen tundras? Indeed, iron was so scarce that at a later day when ships with nails ventured on { 296} these seas natives were detected diving below to pull the nails from the timbers with their teeth. Instead of nails, the Cossack used reindeer thongs to bind the planking together. Instead of tar, moss and clay and the tallow of sea animals calked the seams. Needless to say, there was neither canvas nor rope. Reindeer thongs supplied the cordage, reindeer hides the sails. On such rickety craft, "with the help of God and a little powder," the Russian voyagers hoisted sail and put to sea. On just such vessels did Deshneff and Staduchin attempt to round Asia from the Arctic into Bering Sea (1647-1650).