Ivan Mestrovic, an internationally renowned artist, and his wife lived for years in a house in Indiana. Ivan died in 1982. His widow remained in the house for some years; Upon her death the contents of the house were willed to her children. When the Wilkens bought the house from the estate, it was very cluttered. A bank representative (the executor of the estate) said, "You can clean it yourself and keep whatever items you want, or we—as executor of Mrs. Mestrovic estate—will hire a rubbish removal service to dispose of it." The Wilkens opted to clean it up themselves, and amid the mess, behind sofas and in odd closets, were six apparently valuable paintings by Mestrovic. The estate claimed them; The Wilkens claimed them. Who gets the paintings, and why