Most of Miss Wright's "collection" of information was in her head. As an example, while inventorying collections for the state museum, I asked her about items from the family of a WWII soldier. Muriel began expounding on the soldier, his service record, his parents, full family genealogy, and extraneous bits of information about nearly each person she mentioned. After 20+ minutes, she finally "took a breath" she exclaimed, "Oh! I haven't thought about that family since 1946!" (when she accepted the collection on behalf of the agency).
She was truly marvelous and had a fantastic memory for people, dates, events. As for the physical collection, we don't know what happened to it. She had told me many times that her uncle Frank's collection of photographs (which filled a filing cabinet in her office) were to be the property of the OHS but she never signed papers to that effect. After her death her sister and nephew came to the building and cleaned out her office -- then SOLD a large number of the photos and maybe some of the other things as well. (Frank Wright was a physician amongst the Cheyenne and Arapaho in western Oklahoma during the 1900s, 1910s, etc and had fantastic photos of camps, pow-wows, hunting parties, and individual portraits that he took with his own camera.)
Fortunately she had called me down before her last day on the job and handed over several artifacts that she'd been keeping because she didn't like a previous curator. Among these were Peter Pitchlynn's hunting rifle and a pair of pistols he carried during the war.
She had twelve or fifteen file cabinets with edited manuscripts and unpublished manuscripts but I don't know if any of these were her personally-written articles. I assume these went to the OHS archives but it's possible that the new editorial staff just threw them out since most of them had already been published in the "Chronicles".