Walter is dead, that's why he was listed on the social security death index. I wouldn't be able to find Ruth on the social security death index because I do not know her married name. When someone dies they do not list them on the social security death index under their maiden name , it's under their married name. I think she would have been born about 1905-08 ? But I really don't know. That would be wonderful if your son could ask. Thanks so much.