I have read the Pankratov's book :
this is good. Whithout much ideology. I seems that he died before it was printed.
Pankratov was the Narodovolets (Terrorist Organization of 1860th who arranged the murder of Alexandr II).
He was in Siberia exile for a long time. But then he became geologist and seemed to be very intelligent man.
He was appointed by Kerensky to be the comissaire (or comissar) of the guard of IF in Tobolsk.
He was replaced by the Boluysheviks then.
According to the memoirs , he liked Nikolay and girls very much. He disliked Alexandra and people who served the Family ( Family brought about 40 people with them in Tobolsk). He wrote in details about some habits of IF, about girls (his main statement that they were very good but with uneducated completely) ,about the interior of Tobolsk house
, about that every day he received a lot of dirty letters in which a lot of people wanted to kill the IF - hundreds and hundreds letters with the insults of IF etc. Anyway he never showed it to the Family.
Because of those letters he could not let the Family walk on the town and outside the town. (Personally he thought that he could allow them more free, but he was afraid of those lives).
He wrote that the Tsar had no attention to escape and girls did not want to go to abroad. They wanted to go in "more far and deep Siberia and live there calmly".
Of course , he did not write in clearly, but I felt from this book that the IF could escape when February Revolution has just occured . Of course for this he had to make a effort (many guards was there) , but for the couple ofweeks (guards) was not controlled a lot.