Nabokov's interview. (12) The Sunday Times [1969] brings "a disappointed lepidopterist's ditty"
     It's a long climb
     Up the rock face
     At the wrong time
     To the right place.

There is a blog called "North of Onhava" by a writer named James Greer, with a photograph of Lake Geneva with a few ducks (not swans), carrying  exactly the same lines of Nabokov's ditty. I tried to find a direct reference to him or an indication for such a "zemblance," but got nowhere. Actually, the theme seems to be "nowhere", a mirror image of an utopia perhaps... 
 
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