His play, "The Scarecrow", recently (October 2005) completed a
four-week run in New York; its first staging there in more than thirty
years.
Brother of Benton Mackaye, who built the original Appalachian Trail.
Henry B. Harris, producer of the original Broadway production of
Mackaye's most famous play, "The Scarecrow", was one of the passengers
on the Titanic who did not survive.