I want to know the answer to the following question:
During what time period do some researchers believe Russians settled in Alaska?
All the background I'm provided with is that "This hypothesis is based on the testimony of Chukchi geographer Nikolai Daurkin, who had visited Alaska in 1764–1765 and who had reported on a village on the Kheuveren River, populated by "bearded men" who "pray to the icons".". Is that enough to answer the question?
Answer: no