Where was she living when she wrote her book in 1930?
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Have you been able to trace her sisters? Their obituaries might mention Michaelina. I couldn't find them after their arrival.
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Have you found her on the 1920 or 1930 censuses?
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Zagory is probably agarė, Lithuania.
But I still didn't find anything by looking for them with a birthplace of Lithuania instead of Russia.
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In 1928 when she returned from Bermuda she said she was living in Lock Arbor, New York. This could probably be Loch Arbor, New Jersey, which is less than a mile from Deal, NJ, where her husband was living in 1929 when he remarried in Greenwich, Connecticut
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Her father may have died 16 December 1922, in Hartford. indexed as Michael Namovick
https://www.ctatatelibrarydata.org/death-records/-------
for the record:
their arrival:
29 Oct 1900 manifest of the SS Weimar
Michael Namowich, 45, farmer
Geoloria/Geolorna ?, 24
Alexandra, 14
Emilie 9 1/2 years
Michaeline, 8 months
last residence for all: Zagory
destination: Hartford, Conn
yes they have tickets to their destination
they paid for the trip themselves and are carrying more than $30
They have never been to the US before
their destination: brother in law, Hartford [but no name listed]
all in good health
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1910 Census of Hartford, Ward 6
April 21, 1910
on Main Street
Alexander Keulenas, 28, married 1 time, for 4 years, arrived 1904, naturalized
Martha Keulenas, 28, married 1 time, for 4 years, no children, arrived 1902
Michael Namowicz, 47, widowed, boarder
Michaelina Namowicz, 10, boarder
nationality of all, and of their parents: Russian-Lithuanian
https://www.familysearch.org/ark:/61903/1:1:MK23-SQHno sign of her sisters in 1910.