Jon, it sounds like you're onto something here! The Lloyd Ward you linked fits with your information very well, but I'm not sure about the second wife theory because your Ruth would fit nicely between the 1st and 2nd children on the profile, and since you claim an unknown wife as Ruth's mother, I don't see why she couldn't be the child of the first wife.
Of course, I don't know anything about the time or place or this family, but I also see that there are 2 very active profile managers. If you write to them, working together you should be able to resolve all the information.