In 1882, the Shorthand and Typewriter Institute in Cincinnati was founded by one Ms. Longley, who chose to adopt, among the many competing keyboard arrangements, the QWERTY system. As the school became well-known her teaching methods became the industry standard, even adopted by Remington, which also began to set up typing schools using QWERTY. -- Michael Shermer: "Exorcising Laplace's Demon", History and Theory, Vol.34, No.1 (February 1995), pp.59-83.
Mrs. Elizabeth Margaret Vater Longley surely published "Type-Writer Lessons for the Use of Teachers and Learners Adapted to Remington's Perfected Type-Writers" in 1882 to spread her eight-finger method. However, Mrs. M. V. Longley never stuck to Remington and never chose to adopt QWERTY. She also published "Caligraph Lessons for the Use of Teachers and Learners Designed to Develop Accurate and Reliable Operators" in 1882 with her eight-finger method. She taught her eight-finger typewriting method with Remington Type-Writer No.2 (QWERTY) and also with Caligraph No.2 (non-QWERTY) until she left Cincinnati on the last day of May, 1885.