HERE. Today, January 16, is his birthday (1919). He appeared in several Kerouac novels: as Hal Hingham in On The Road; Early Wallington in Book of Dreams; and, Worthington in Book of Dreams (expanded edition).
Harrington introduced Jack Kerouac to John Clellon Holmes, no small matter given the deep friendship that ensued between them -- "brother souls" as my great friend Richard Marsh would point out.
An interesting blog post with info about Harrington is available HERE. I still haven't read any of his work, but it's on my (long) list of things to do.
Happy Birthday, Mr. Harrington.