Hardman Family HIstory

I have been doing a little research for Mary Jane Prior, born 1834(wife of Daniel G Humphrey, and parents for Allie Virginia Humphrey who married William J Hardman).
Story has it that Allie may be half Indian and half French, so I searched for the Indian half. Mary Jane Prior is listed as being born in Mississippi, (she may be the Indian). There were 8 tribes in that state when Mary was born. She was married in Caddo Parish (county) of Louisiana so I searched for any reason she may have been in Caddo Parish. In 1829 65 Biloxi Indians were living with the Caddo Indians and many Biloxi's were scattered over the whole area into Texas. In 1886 Some were also living in Avoyelles Parish, La. These dates are not when they moved to those areas, the dates are from the time they were noted by someone as seeing them there at that time, most likely by Mr. Gatschet. 
Information on Biloxi came from here: Click here

Here is what I have for the marriage of Mary and Daniel. Could this be where the Indian came from? Did Daniel meet Mary in the Caddo Parish, Shreveport, LA. area and then get married? Do you have any ideas that you would like to share?

Louisiana Marriages to 1850 about D. G. Mary Jane Humphrey Prior

Spouse 1: Humphrey, D. G. Spouse 2: Prior, Mary Jane Marriage Date: 29 May 1849 Marriage Location: Louisiana Caddo Parish