Letter from Billie Hamlet of the NZP to Brian Sheridan, October 15, 1976, by Hamlet, Sybil E, October 15, 1976, Smithsonian Archives - History Div, A letter from Billie Hamlet, Information Officer, National Zoological Park to Brian Sheridan of Baltimore, Maryland. Hamlet includes information about Smokey and Little Smokey as well as their enclosures at the National Zoological park..