At the end of "Ardis the First" Van and Ada (the two main characters in VN's novel Ada, 1969) visit a Russian traktir in Gamlet (a half-Russian village near Ardis Hall):
‘We must now find our bicycles,’ said Van, ‘we are lost "in another part of the forest."’
‘Oh, let’s not return yet,’ she cried, ‘oh, wait.’
‘But I want to make sure of our whereabouts and whenabouts,’ said Van. ‘It is a philosophical need.’