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.
Johnstone was educated at the City College of New York, studied piano with William Mason, organ and theory with Samuel Warren, and higher composition with Leopold Damrosch.
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.
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