A book by Flora Screiber says, Mary, Peggy Lou, Vicky & Vanessa were 4 of this title character's 16 personalities
MPD/DID ... [PAR] We do run articles which detract Sybil's authenticity simply for information; we ... 
for 25 years show the popular story of Sybil, the woman with 16 personalities, is 
bogus.