Even documents that are not supposed to provide parental information could. This World War I draft card indicated that the registrant was working as a farmer for his father, naming the father. One never knows when a document will provide extra information that’s not really required. It pays to look. 
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One response
I have a lot to go through and look at. Pictures to put with families. Get a magnafying glass & REALLY look at papers I have. So appreciate ur information.