A market for photographs emerged in the 1970s, partly led by museum curator and art historian Samuel Wagstaff, who was also Mapplethorpe's lover. ("The career Robert had would not have existed without Sam," says writer and raconteur Fran Lebowitz in "Mapplethorpe: Look at the Pictures," the finely textured documentary by Fenton Bailey and Randy Barbato airing April 4 on HBO.) Wagstaff's historically important collection of more than 25,000 photographs was acquired by the Getty Museum in 1984, becoming an anchor of its incomparable holdings. A selection will be on view in conjunction with the museum's Mapplethorpe show.
Source : http://www.latimes.com/entertainment/arts/museums/la-ca-cm-knight-mapplethorpe-notebook-20160306-column.html