Laura's father was Zemeria Hollingsworth so we assume she'd married previously to a man named Garver. The marriage register shows that each of them had been previously married.

Witnesses to the marriage were Alvinda Chappelle and Mary Wilbur.

James can be seen in the 1900 US Census, living at Maple Forest township, Crawford, Michigan:
James Knibbs Head 21 Michigan Farmer
Katherine Knibbs Mother 49 New York
Charles Knibbs Brother 19 Michigan Labourer
Herbert Knibbs Brother 16 Day Labourer
Albert Knibbs Borhter 13 Michigan At School
Martha Knibbs Sister 9 Michigan At School
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In 1910, we see James and his mother living at Maple Forest, Crawford County, Michigan. I'm told that they lived next door to Zemeria Hollingsworth and his family. We know of course that James went on to marry two of the Hollingsworht daughters, Ada in 1910 and Laura in 1922.
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James gave his brother Herbert as his nearest relative on his military registration card in 1918.

See James' Military Registration Card from 1917
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In 1920, we see James living at Crawford Michigan with three children, Laura, James E, Leonard and Kenneth White. Kenneth was identified as a Stepson. By this time, James was already a widower.
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In 1930, James was living at Grayling, Crawford, Michigan:
James F Knibbs Head Mar 43 Michigan
Laura Knibbs Wife Mar 43 Illinois
Chester Garver Stepson UnM 21 Illinois
Earl Garver Stepson UnM 19 Illinois
Vergel Garver Stepson 16 Illinois
James E Knibbs Son UnM 16 Michigan
Lenord Knibbs Son 12 Michigan
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James F Knibbs M 52
Spouse Laura Knibbs F 43
Chester Garver M 21
Earl Garver M 19
Vergel Garver M 16
James E Knibbs M 16
Lenord Knibbs M 12


He is buried at Maple Forest Township Cemetery, Crawford County, Michigan

In 1920, Laura was living at Decatur, Macon, Illinois, a widow with three children, Chester, Earl and Virgil.