In response to Gustavus and mainxzibit6789: Tommy's mother would know what caused Tommy's illness. His father, however, returned home and immediately killed his wife's boyfriend, causing Tommy's loss of senses. He would only know that Tommy was born with sight, hearing and speech if his wife told him. Under the circumstances, it is possible that out of guilt, Mrs Walker would have told him that Tommy had always been like that.
In response to Gustavus and mainxzibit6789: Tommy's mother would know what caused Tommy's illness. His father, however, returned home and immediately killed his wife's boyfriend, causing Tommy's loss of senses. He would only know that Tommy was born with sight, hearing and speech if his wife told him. Under the circumstances, it is possible that out of guilt, Mrs Walker would have told him that Tommy had always been like that.