inspired Melville to write Moby Dick) had this situation:
"The men drew lots to determine who would be sacrificed for the survival of the crew. A young man named Owen Coffin, Captain Pollard's 17-year old cousin, whom he had sworn to protect, drew the black spot. Pollard allegedly offered to protect his cousin, but Coffin is said to have replied: "No, I like my lot as well as any other". Lots were drawn again to determine who would be Coffin's executioner. His young friend, Charles Ramsdell, drew the black spot. Ramsdell shot Coffin, and Coffin's remains were consumed by Pollard, Ramsdell, and Barzillai Ray. On February 11, Ray also died. For the remainder of their journey, Pollard and Ramsdell survived by gnawing on Coffin and Ray's bones."
http://en.wikipedia.org/wiki/Essex_%28whaleship%29#Pollard_and_Hendricks_boats