Deaf Mosaic 304.  "A River Life" profiles Maggie Lee Sayre, whose photos are the only reminder of a now-vanished Tennessee River culture; part II of the profile of Bernard Bragg; Marlee Matlin talks about her attitudes about success, both before and after her Oscar winning triumph; and "Hit 21," the story of Las Vegas deaf blackjack dealer Gerri Ehrlich.  [July, 1987]