junkshop
Otto's Favourite
Vixen, I am assuming (as you have quoted and cited it) that you have a copy of Nelson's book. Does Nelson claim to have interviewed either Vassili?Well, Nelson directly quotes 'Vashya', who says, 'I'm not going to abandon you.' So there you have it. There's his direct source of information.
If so, does he give any details as to when this/these interview/s occurred?
If not, does he discuss what sources he used to reconstruct their experiences?