Contact a title company in OK and request a complimentary "property profile". This report, although informal, will tell you whether the property was conveyed after the 1931 deed was executed. I would also repost this in the OK forum. Each state has different laws about title superiority. In this case, I presume your deed was not recorded. That may or may not affect your title claim. You should also look into conferring with a real estate attorney in OK. Good luck!
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I agree with Mr. Lowenthal - you will need to obtain a title search to see if the 1931 deed accurately reflects the current state of ownership.
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