From the May 1, 1910 New York Times:

“As a result of a girl companion’s prank, played more than a year ago, Miss Mary V. Sullivan lies dead at the home of her mother, Mrs. Catherine Sullivan, at 821 South Eleventh Street, Newark. The young woman died on Friday night. About a year ago Miss Sullivan and several girl friends were playing jokes on each other. During the frolic one of the girls pulled a chair from under her just as she was about to sit down. In falling she injured her spine.”