Read it through once

“My boy, my own boy is among them. For God’s sake—I beg, I conjure”—here exclaimed the stranger Captain to Ahab, who thus far had but icily received his petition. “For eight-and-forty hours let me charter your ship—I will gladly pay for it, and roundly pay for it—if there be no other way—for eight-and-forty hours only—only that—you must, oh, you must, and you _shall_ do this thing.”