Tammy, The possibility of Illinois added a research link...
I found them in the 1930 census as follows: Ross Twp., Vermillion Co., IL Raymond G. Smith46age at first marr.-28b. INparents b. NCsupt. of construction for the telephone Co. Marywife39age at first marr - 22b. INparents b. IN Maryettadau3&2/12b. INparents b. IN
As you can see...they are all listed born in Indiana.That could be a mistake or...not.Also, Maryetta is not listed with the surname of Spalding, or as STEPdaughter.It may be just a slip up in taking the census data.But there again, Raymond may have thought of her so much as a daughter that he didn't even think twice about listing her as that.I see these types of mistakes often in census records. You have to take ALL data together to come up with the best answers sometimes - if specific documentation cannot be found.You may want to try to get her birth certificate.Do you know the places of Mary, Frank, and Raymond's deaths?If so, you might want to get their death records.Parents' names are many times listed on them.That would help to verify if Mary's father was indeed Joseph or the George that I noted.
I will have to save my lookup for George W. Martin for another time.It is late.Will get back to you as soon as I can.How about sending me an email and we can work on it that way.My firstname.lastname@example.org