I hope this query is relevant to this listserve. A relative of mine was born at Columbia Hospital for Women in January 1937. She was a twin. The doctor told the birth mother that the other twin did not survive. There was/is no birth certificate for the "surviving" twin, no death certificate of the "deceased" twin, and no record of the mother's hospital stay (she was there for 10 days!) The surviving twin thinks the baby may have been placed for adoption by the doctor, thinking the parents were poor and already had children. If there is anyone who can recommend how best to begin to unravel this mystery, I'm all ears and would appreciate some guidance.