Shark attack, 1956-01-16 (Unprovoked)
Location: San Juan River, , COSTA RICA
Activity: Swimming
Victim: Lester  Burton (M, age 33)
Injury: FATAL, leg severed 
Fatal: Y
Source: Washington Post, 1/18/1956;  Note: Webster, p.55, has date of 1/18/1956 and location as Sapoa River in Nicaragua.