Complex sentence: While others profited from the day, Jarvis did not, and spent many of the later years of her life with her sister Lillie and, by 1944, was placed in the Marshall Square Sanitarium in West Chester, Pennsylvania.
Split into simpler sentences: While others profited from the day, Jarvis did not, and she spent the later years of her life with her sister Lillie. By 1944 she was placed in the Marshall Square Sanitarium in West Chester, Pennsylvania.