Well, it took some long time searching for the story. It is sad to say the least, but here is what I found.
Margarette Laplante was b. abt 1864 to John Baptiste LaPlante, b. 1815 in Indiana and Josephine "Josette" LaPlante, b. abt 1837, a Yankton Sioux. See 1870 and 1880 Big Sioux, Union, Dakota Terr. census.
I first find her on the '86 Yankton ICS married to Edward "Ed" Lyman, probably about 1885. They had a daughter in '86 who died '86-'87. He is gone by '90 census and she is alone.
1893 she is Margarette Sherman married to an unknown Sherman. If anyone knows please share. Margarette has two daughters by Sherman in '95 and '97, both do not survive. I do not know when she divorced Sherman but she goes by that name until '99 when she is Margarette Quinn.
Margarette has a daughter with Samuel Quinn of the Sisseton Agency by the name of Cora Quinn, b. 26 Apr 1900. Cora is listed with her father on the Sisseton Agency census. This relationship does not last long in '02 she is back to Margarette Sherman and in '03 she is listed as Margarette Quinn. I could find no 1900 census that showed them living together, so maybe they did not.
In the meantime, Charles Phillip Bruguier has divorced Agnes Arconge abt 1900. So from 1900 to 13 of Apr 1904 when he marries Susan Canfield, he is a free man. I presume he is having a good time before he has to settle down and is fooling around with Margarette.
Margarette gets pregnant with Mary Bruguier who is b. 25 Apr 1904, 10 days or so after Charles marries Susan Canfield. Margarette dies in childbirth. Mary is taken in by her uncle Charles LaPlante who is newly married to Margaret Escacerga of Ft Peck. Mary now becomes Mary LaPlante, daughter of Charles and his wife Margaret. This is why you cannot find her.
Charles and Margaret are in Wahehe on the 1910 and 1930 census. In 1920, I cannot find them in Charles Mix. But, that is when Mary Bruguier shows up living with her father on the 1920, Wahehe, Charles Mix census as Mary Bruguier and then on her marriage record she is also Mary Bruguier.
Mary goes on to marry George A Westerman in 1926 who is living in Santee, Knox, Neb and divorced. Mary is a maiden and living in Greenwood, Chas Mix at the time. As far as I can determine at this point, they have two children: Linda and Paul.
Mary Westerman was admitted 4 Oct 1936 along with Oscar Hope to the St Elizabeths Psychiatric Hospital in Washington, D.C. where both she and Oscar perished. Their bodies were shipped back to S.D. for burial. What I want to know is did they come home with their brains?
When Hiawatha Indian Insane Asylum closed its doors in 1933, seventy one Indian patients were transferred to St Eliabeths, where 30% of them perished including my cousin, Peter Picotte.
Sioux relatives who did not come back:
Maggie Black Cat - Pine Ridge
Albert Blaine - Yankton
Joseph Carpenter - Cheyenne River
Stella Fast Horse - Pine Ridge
Sarah Shortwoman - Cheyenne River
Peter Picotte - Yankton
Mary Westerman - Yankton
Oscar Hope - Yankton
And, that is just from our Sioux Nation. To read more:
www.recoveryxchange.org/downloads/Forgotten%20Dead%20of%20St.%20Elizabeth's.pdf
Lavanah