Did Frau Monde indicate Savonarola as the  monk in Tuscany whom, in the past, she had incorporated? 

 

When I observed the similarities between the limits set by Tolstoy's devil and Nabokov's ( from sunrise to sunset), I was imprecise.  

Tolstoy made it clear that, since sunset reaches different parts of the Earth at distinct moments, the right sunset was the one that exactly corresponded to the contestant's point of departure, not to when darkness overcame him en route. 

Nabokov's Frau Monde's time followed a mechanical device: the time-limit was not the sunset but the midnight hour.