In 1920 Maggie is living in Douglas, Converse, WY,
Maggie Wheelock, head household, married, b. OH, 39, rooming house manager.
In 1930 is living in Douglas.
Maggie A. Wheelock, head household, married, b. OH, 50, owner rooming house with three boarders.
In 1940 Maggie is living in Doulgas.
Fred Au France, head household, b. OH, 27, farm hand.
Mildred, wife, b. OH, 24, housekeeper private home.
Mary A., b. OH, 3.
Maggie Wheelock, aunt, widow, b.OH, 62.
Evidentally Maggie and her husband Ben led a colorful life which is explained in the Baker Family Tree, trees.ancestry.com/tree/5196419/person/6105327152.
Maggie died in 1940 in Douglas, Converse, WY. She and her husband Ben are buried in Douglas park Cemetery, Douglas, Converse, WY.
"Born and raised in Ohio, Margaret AuFrance came to Wyoming in the late 1890's on the arm of a man who would soon prove to be a professional paramour--to herself, and to a subsequent parade of equally naive or complicit young women. After estabishing 'Maggie' as a professional madam in the new city of Douglas, the man disappeared, leaving her to fend for herself. Which she did, with uncommon success.
Maggie took to recruiting and very efficently managing a score of willing young women out to profit from the carnal appetites of the western frontier. City Hall turned a blind eye to the business--except for tax assessments, invariably levied at twice the going rate, augmented by fines generated in police raids conducted according to the city's financial necessity.
Maggie's husband, Benjamin E. Wheelock, whom she wed in 1913, was fluent in several American Indian languages and served as an interpreter for the state and federal governments.
Maggie followed her husband to the grave after a period of only seven weeks; the two are buried side-by-side, and share a common marker. (Benjamin's father, B. C. Wheelock, also resided in the area and interred beside the couple).
Even though there is a picture of the tombstone, the exact death date isn't shown. Since the death is greater than 50 years old, you can contact Wyoming Archives and find the exact date.
There is a Converse Co. obituary volunteer at freepages.genealogy.rootsweb.ancestry.com/~obitl/volwy.html.