"But You Did That in Thirty Seconds." "No, It Has Taken Me Forty Years To Do That." Pablo Picasso? Mark H. McCormack? James McNeill Whistler? Apocryphal? Dear Quote Investigator: A rapidly created artwork may still be quite valuable. An anecdote illustrating this point features Pablo Picasso and a pestering art lover. Would you please explore whether this tale is authentic or apocryphal? Quote Investigator: The earliest instance of the Pablo Picasso vignette located by QI appeared in the 1984 b...