|Mrs. Winslow's Soothing Syrup for children teething from the Boston Public Library Flickr Album|
Mary Ann McGowan was born June 26, 1889 in Pittsburgh, Allegheny, Pennsylvania. She was the firstborn child of Patrick Henry and Lizzie McNamara McGowan.
She was probably baptised at St. John the Evangelist (South Side) Pittsburgh.
Mary died September 20, 1890 in Pittsburgh, probably at her family's home located at 2924 Larkins Alley, Pittsburgh.
|Larkins Alley at South 19th Street, looking toward Eighteenth Street. Public Domain|
Her primary cause of death was listed as teething.
Mary is buried in Calvary Cemetery located at 718 Hazelwood Avenue, Pittsburgh.
Death by teething was more common than I realized. See this excellent post on the subject by Sonja Hunter "Rethinking Teething Deaths"