Sub-Mariner #46, published by Marvel Comics with a cover date of February 1972, is a key Bronze Age comic book titled "Even the Noble Die!". This pivotal issue marks the emotional conclusion of Namor’s quest to find his long-lost human father, Captain Leonard Mackenzie. 

Namor desperately tracks down his long-lost father, Captain Leonard Mackenzie, only to find him held hostage by the combined forces of the sea-witch Llyra and the villainous Tiger Shark (Todd Arliss). As Namor engages in a brutal battle against Tiger Shark, the hero Stingray (Walter Newell) joins the fray to assist the Sub-Mariner. Though Namor successfully locates his father, the reunion ends in tragedy when Captain Mackenzie is killed during the chaos, making it a landmark emotional issue in the Sub-Mariner mythos.