Following the end of the war, Mary Hays and her husband William returned to Carlisle, Pennsylvania.
During this time, Mary gave birth to a son named Johannes (or John).
In late 1786, William Hays died.

In 1793, Mary Hays married John McCauley, another Revolutionary War veteran and possibly a friend of William Hays.
McCauley was a stone cutter for the local Carlisle prison.
However, the marriage was reportedly not a happy one, as McCauley had a violent temper.
It was McCauley who was the cause of Mary's financial downfall, causing Mary to sell 200 acres (81 ha) of bounty land left to her by William Hays, for 30 dollars.
Sometime between 1807 and 1810, McCauley disappeared, and it is not known what happened to him.

Mary McCauley continued to live in Carlisle.
She earned her living as a general servant for hire, cleaning and painting houses, washing windows and caring for children and sick people. "
Sergeant Molly," as she was known, was often seen in the streets of Carlisle wearing a striped skirt, wool stockings, and a ruffled cap.
She was well-liked by the people of Carlisle, even though she "often cursed like a soldier."

On February 21, 1822, the Commonwealth of Pennsylvania awarded Mary McCauley an annual pension of $40 (equivalent to $768 in 2019) for her service.
Mary died January 22, 1832, in Carlisle, at the approximate age of 87.
She is buried in the Old Graveyard in Carlisle under the name "Molly McCauley".
A statue of "Molly Pitcher," standing alongside a cannon, is also in the cemetery.
Following the end of the war, Mary Hays and her husband William returned to Carlisle, Pennsylvania. During this time, Mary gave birth to a son named Johannes (or John). In late 1786, William Hays died.
In 1793, Mary Hays married John McCauley, another Revolutionary War veteran and possibly a friend of William Hays. McCauley was a stone cutter for the local Carlisle prison. However, the marriage was reportedly not a happy one, as McCauley had a violent temper. It was McCauley who was the cause of Mary's financial downfall, causing Mary to sell 200 acres (81 ha) of bounty land left to her by William Hays, for 30 dollars. Sometime between 1807 and 1810, McCauley disappeared, and it is not known what happened to him.
Mary McCauley continued to live in Carlisle. She earned her living as a general servant for hire, cleaning and painting houses, washing windows and caring for children and sick people. "Sergeant Molly," as she was known, was often seen in the streets of Carlisle wearing a striped skirt, wool stockings, and a ruffled cap. She was well-liked by the people of Carlisle, even though she "often cursed like a soldier."
On February 21, 1822, the Commonwealth of Pennsylvania awarded Mary McCauley an annual pension of $40 (equivalent to $768 in 2019) for her service. Mary died January 22, 1832, in Carlisle, at the approximate age of 87. She is buried in the Old Graveyard in Carlisle under the name "Molly McCauley". A statue of "Molly Pitcher," standing alongside a cannon, is also in the cemetery.
Mary Hays (American Revolutionary War)