NEW YORK.- Sotheby’s 18 May 2011 sale of American Indian Art in New York will include major pieces from a number of distinguished private collections including The Bruce and Nancy Berman Collection of Navajo Blankets, paintings from the Hascoe Family Collection and the Davies-Cooke Collection. The standout highlight from the various owner section of the auction is an Oglala Sioux Beaded and Fringed Hide War Shirt which once belonged to Chief Black Bird, one of the most documented Native Americans of his generation. The shirt is made all the more remarkable by the existence of photographs showing it being worn by its original owner (est. $250/350,000). Photographic documentation of an artifact as important as the Oglala Sioux Shirt is very rare. In this case though, several images exist of Chief