She was riding in a horse and buggy, with her husband James, the horse bolted and fearing the buggy would upset, she jumped from the buggy.  She was killed and her husband was not.

Grave 7-11 Price's Corners Cemetery - McGowan - In memor of Mary M. Hawes, bleoved wife of James McGowan, who died July 6, 1877 aged 45 yrs and 15 days.  Jesus has called the mother home.  In memory of James McGowan, who died May 17, 1896, in his 70th year.

Ontario, Canada Deaths, 1869-1932 Record info about Mary McGowan
Name: Mary McGowan Death Date: 6 or 7 Jul 1877 Death Location: Wellington Gender: Female Estimated Birth Year: abt 1832 Birth Location: On #015897

On the death registration the cause of death is listed as convulsion of the brain caused by falling from a buggy, duration, 10 hours.  The informant was Daniel Haws.  Age is given as 45 years 14 days.  Her place of birth is listed as Ontario?