Sigh. It is 8 hours from Tver to Ruibinsk.
No, no. I have it wrong. (My dogears and marginalia are bound to get me in trouble along the way.) The fare to Ruibinsk cost 8 rubles but the passage will take two days.
Goodness. I have two days to watch the banks of the Volga rise and sink.
Distance from Tver: 20 versts