Captain Rudakoff

He may be the same Captain Domitti Rudakoff of the Russian Imperial Navy who commanded the Irtysch in Siberia.

Sources:

• Hill, S. S. Travels in Siberia, Volume 2. Siberia: Longman, Brown, Green, and Longmans; 1854. http://books.google.ca/books?id=HcxBAAAAYAAJ&pg=PA345&lpg=PA345&dq=rudakoff+cap tain&source=bl&ots=xNzU_bNvfB&sig=m_abC- bHd1LCUJPOEFPxg_jsQ3A&hl=en&sa=X&ei=A2MnU4- 9J8aJogTVp4GwAw&ved=0CCkQ6AEwAA#v=onepage&q=rudakoff&f=false.