As of this posting, composer Walter Arlen is 99 years of age and living in Santa Monica, California. An account of his very interesting life (with pictures) can be read at http://orelfoundation.org/journal/journalArticle/walter_arlen_things_turn_out_differently
In 1968, when I first met Walter Arlen, he was chair of music at Loyola University of Los Angeles, where I was quite active in the music program, even though I was studying classics and not music. At the time, Mr. Arlen was also a music critic at the Los Angeles Times.
Walter Arlen himself is not an organist, and because of that he asked me in 2019 to contribute some "organist-friendly" editings to his original score--a task which I gladly undertook. A noteworthy feature of this work is the simulated pealing of bells. If you listen carefully, you may even spot a place where real chimes could have been used, had they been available on this particular instrument.
I have also uploaded Walter Arlen's earlier (ca. 1966) Sonnet for Organ to contrebombarde.com.