The famous Wyatt Earp was born in the same town as Ralph Greenleaf---Monmouth, IL.
Wyatt's brother Morgan was killed in a poolroom in Tombstone, AZ.
Two months after the gunfight at the O.K. Corral, in December 1881, Virgil Earp was seriously and permanently wounded in an assassination attempt. By February 1882, Morgan had seen enough of the general danger to the Earps in Tombstone and sent his common-law wife Louisa Houstin Earp to the Earps' parents in Colton, California. However, Morgan chose to remain in Tombstone to guard Virgil, support Wyatt, and continue to work in law enforcement.
Morgan was ambushed about 10 P.M. on Saturday, March 18, 1882. After going to see a musical, he went to play a late round of pool against owner Bob Hatch at the Campbell & Hatch Billiard Parlor on Allen Street, in Tombstone. There, while playing, he was hit by a rifle shot to the side of his lower back. An assassination attempt was also made at the same time on Wyatt Earp, who was watching the game, but the bullet missed.
The rifle shots entered the lighted billiard parlor through a glass-windowed locked door which opened from the rear of the parlor onto a dark alley, which ran between Allen and Fremont Streets, along the side of the parlor. The Campbell and Hatch Billiard parlor and card room no longer exists, having burned in a fire in May 1882. It was two lots east of Hafford's Saloon on 4th Street and Allen, which was re-built after the fire and may be seen today. An old photo said to be of the interior of the Campbell & Hatch billiard parlor room, is actually of another similar institution.
The bullet that hit Morgan shattered his spine and passed through his left kidney. The wound was pronounced fatal by the three doctors who examined him a short time later. After being shot, Morgan was unable to stand even with assistance, and said "This is the last game of pool I'll ever play." Wyatt reported in his biography years later that Morgan, before dying, whispered to Wyatt "I can't see a damned thing," a reference to supposed visions of Heaven seen by dying people, which Morgan and Wyatt had discussed on a previous occasion. To the last, Morgan's behavior is in keeping with what is known of him. He died less than an hour after being shot, while lying on a lounge in an adjoining card room of the billiard parlor, not on the billiard table, as some accounts report.
Earl Newby, who started the old Billiard News in the 1960s, also claimed to have been born in Monmouth, IL.