I don't think Anna liked cremation. She was suing Marshall's family for his body because she didn't want him to be cremated. I'll see if I can find some documentation to back that up.
http://www.houstonpress.com/1999-12-02/news/larger-than-life/full
"They tried to portray the widow as a gold digger, but she either wept at their questions or professed not to understand. On several points, she was clear. No, she had not retrieved the old man's ashes; cremation was "really disgusting." Yes, she was faithful to Pawpaw. And though she couldn't remember which day she was married, she was sure it was one of the most important in her life."