Born: May 13, 1860, London, England.
Died: January 23, 1944, Wilkes-Barre, Pennsylvania.
Arthur was the son of Frank E. Johnstone and Minnie DeFries, and husband of Clara Archer Butler. He was brought to America in 1868.
He made a specialty of composition, including piano methods and music for public school textbooks. He won a medal in 1902 for the best original setting of America offered by the Society of the Cincinnati.
As of 1912, Johnstone was living in New York City.