Catherine Mary White Foster lived with her elderly parents in the red brick house on the northwest corner of Washington and High Streets in Gettysburg at the time of the battle, 1-3 July 1863. She was the only child of James White Foster and Catherine (nee Swope) Foster (a former resident of Lancaster county), who married on 11 May 1817 and settled in Gettysburg, Adams county, Pennsylvania. Her father, James White Foster, had served his country as a first lieutenant in the War of 1812. Her grandparents, James Foster and Catherine (nee White) Foster, had emigrated with her father and five older children from county Donegal, Ireland, in 1790, and settled near New Alexandria, Westmoreland county, Pennsylvania. [excerpt]
Murdoch, David A.
"Catherine Mary White Foster's Eyewitness Account of the Battle of Gettysburg, with Background on the Foster Family Union Soldiers,"
Adams County History: Vol. 1
, Article 5.
Available at: http://cupola.gettysburg.edu/ach/vol1/iss1/5