Born: October 11, 1870, Warsaw, New York.
Died: July 28, 1957, at his home in Hollywood, California.
Buried: Forest Lawn Memorial Park, Los Angeles, California.
Earl was the son of Jacob J. Brininstool and Ellen S. Blossom, and husband of Estelle Owen.
After earning a business degree, he moved with his wife to Los Angeles in 1895.
He first worked as a journalist, but later became a freelancer, writing poetry, and publishing articles in Hunter-Trader, Sunset, Frontier Times, Outdoor Life, Winners of the West, and other magazines.
He is also known for biographies of the Indian leaders Crazy Horse, Red Cloud, and Dull Knife.