Morozko got as far south as the Tegil river on the west side of the peninsula and returned with some 'mysterious writings', apparently from a wrecked Japanese ship.
Continuing down the west side he reached the Icha River where he rescued or captured a Japanese sailor who had been shipwrecked.
Returning north to the Icha, he sent a party of men over the mountains to build an ostrog at Verkhnekamchatsk on the upper Kamchatka.
Here he decided to return to Anadyrsk, either under pressure of his men or because he was running short of gunpowder and lead.
On the Angara River in 1701 he met and plundered a merchant's boat loaded with Chinese goods.
On the journey his methods were so rough that most of his men sent a letter of protest to Yakutsk.