Sources of above information: Richard Brownlee, "Gray Ghosts of the Confederacy"; William Connelley, "Quantrill and the Border Wars"; Jay Monaghan, " Civil War on the Western Border 1854-1865"; Paul Wellman, "A Dynastyof Western Outlaws". There were also a few magazines I found information in.
As to trying to obtain proof of marriage certificates, back then the preachers would write the names, dates, etc on pieces of paper and when they returned to their churches or court house, would record the information. This happened a lot back then because the preachers or justice of the peace moved around a lot. It would be very easy for them to lose the information and possibly forget about it. I learned this when I tried to get a copy of Jesse James marriage certificate. It is very hard to find this kind of documented proof.
As to her burial place, that is a controversery also. As is Quantrill's burial place, Jesse James' burial place and many more. Quantrill has at least 5 or 6 places and parts of him scattered all over. His skull is in one place, and many of his bones either in museums or gravesites.