There are, as criticism has come slowly to recognize, not one but two Hemingway heroes; or, to use Philip Young's designations, the "Nick-Adams-hero" and the "code-hero." The generic Nick Adams character, who lives through the course of Hemingway's fiction, appears first as the shocked invisible "voice" of the miniatures of in our time; he grows up through Hemingway's three volumes of short stories and at least four of his novels, sometimes changing his name to Jake Barnes, Frederick Henry, Mr. Frazer, Macomber, Harry, Robert Jordan, Richard Cantwell; and he makes his final appearances (appropriately un-named as when he first entered the fictional stage) in Hemingway's last two published stories in 1957. The code-hero also figures in Hemingway's earliest fiction. He dies of a cogida as Maera in in our time, and he is resurrected in a considerable variety of shapes, forms, and accents (usually non-American) through the bulk of...