.... seems uncertain. I asked the chairman of the Oscar Wilde Society, Donald Mead, about the citation "Talent borrows, genius steals" and just received this reply:
"I wish I could help. I have always thought this was Stravinsky, not Oscar, but I can't find anything to prove it was either. If you do find a definitive answer to your question, do please let me know what it is!
Yours sincerely,
Donald Mead
Chairman, The Oscar Wilde Society"