Wilson began in the 1990s .
Wilson maintained a small , but very valuable , art collection , including works by Claude Monet , Edouard Manet and Alfred Sisley ; his collection was valued in the tens of millions of dollars .
Beginning in the 1990s , Wilson maintained a small , but very valuable , art collection , including works by Claude Monet , Edouard Manet and Alfred Sisley ; his collection was valued in the tens of millions of dollars .