No trace of Lester Young with strings on records
In the 1958 interview made in Paris that is in the 'Lester Young' box on Verve, Lester Young mentions that somebody in New York (Gil Evans is assumed to have been that man) was 'writing some music for me. When I get back, I got bass violin, two cellos and a viola, and a French horn, see what I mean?'.
Lester Young died in New York two weeks after that interview...