Buccaneer of the Star Seas

A nifty pulp SF story written in 1940 and published in Planet Stories. What would happen if someone found the secret of immortality in 1423 and lived until the 20th century? Of course the catch is that someone must die for him to keep on living; it must be a woman, a woman who loves him and he must do the killing. Carlyle may be such a man. In this story, he roams the uncharted star-seas, seeking Death as he sought the richly-laden derelicts in that sargossa of long-vanished space-galleons. Did