When Van Veen (the narrator and main character in VN’s novel Ada, 1969) leaves Ardis forever, the word “inkog” pops up in his stream of consciousness:
The express does not stop at Torfyanka, does it, Trofim?’
‘I’ll take you five versts across the bog,’ said Trofim, ‘the nearest is Volosyanka.’
His vulgar Russian word for Maidenhair; a whistle stop; train probably crowded.