-
Exact date of birth is unknown, but only the year.
-
John Van Lew died, and his wife, son, and daughter decided to free his slaves. They also bought the rest of the slave's family only to free them. Mary remains as a servant to the household. Date unknown, only year.
-
Bowser is sent to Quaker School for Negroes in Philadelphia to be educated. Exact date/year is unknown,
-
Bowser graduates from Quaker School for Negroes. Exact date/year is unknown.
-
The Civil War begins.
-
Mary Bowser married Wilson Bowser, a free black man. Exact date/year is known.
-
Elizabeth Van Lew had got Mary Bowser to spy for the Union. Bowser played as a slave in the Confederate White House under the name of "Ellen Bond". Exact date/year unknown.
-
Jefferson Davis (Confederate President) had become aware that there was a leak in the Confederate White House. Bowser was suspected to be a source of the leak, and she fled. As she fled, she attempted to burn down the Confederate White House, but was unsuccessful. Exact day unknown, but only month/year.
-
The Civil War ends, with the Union reigning victorious and the Confederate States of America losing.
-
Exact date of death is unknown.
-
In 1995, the U.S. government honored Mary for her efforts in spying, by inducting her in the U.S. Army Military Intelligence Corps Hall of Fame. Exact date is unknown, only year.