Annie was born in Auburndale, Massachusetts, in 1876, the daughter of Edward and Annie (Black) Morgan. Note that while admission records for the Hospital Cottages for Children give her name as Annie Maud Morgan, birth and census records tend to call her "Annie B. Morgan". In 1880, she lived in Newton with her family, including her parents, 2 sisters, and 17 year old Fannie C. Foster, who is called a "1/2 daughter" to Edward Morgan, the head of the household.
Annie was admitted to The Hospital Cottages for Children in Baldwinville, Massachusetts, in March of 1900, with epilepsy. She was discharged in September of the same year as "much improved".  In the 1900 census, she is listed as a patient at the facility and was 24 years old. She is also listed that year with her family in Newton.
She was later admitted to the Hospital for Epileptics in Monson, Massachusetts, about 1905. She was a patient for 5 years when she died there of epilepsy in 1910. She was 34 years old. She is buried at the Newton Cemetery in Newton, Massachusetts.
While she would have been a patient at the Monson hospital in 1910, she is also listed with her family in the census that year. Her father was an expert accountant, and her mother and 2 sisters also make up the household.
↑ "United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M9B4-34Q : accessed 4 August 2019), Annie M Morgan, The Hospital Cottages for Children Baldwinville village, Worcester, Massachusetts, United States
↑ "United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M9TD-62X : accessed 4 August 2019), Annie B Morgan in household of Edward E Morgan, Newton city & Auburndale village Ward 4, Middlesex, Massachusetts, United States;
↑ "United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M2VG-W57 : accessed 4 August 2019), Annie B Morgan in household of Edward E Morgan, Newton Ward 4, Middlesex, Massachusetts, United States