The female main character of this novel walks with “a natural haughtiness…her doe’s gait making her seem immune to gravity.” The male main character complains that “love is the only thing that interests me” to his uncle, who replies “The trouble is that without river navigation, there is no love,” which the man discovers for himself at the end of the novel on a fateful riverboat voyage after waiting fifty-one years, nine months, and four days, at the end of which Jeremiah Saint-Amour’s suicide and a parrot-catching attempt result in the death of Dr. Juvenal Urbino, allowing Florentino Ariza to resume his courtship of his widow, Fermina Daza, culminating in the riverboat voyage where they ask the captain to raise a flag indicating the titular disease. Name this novel by Gabriel García Márquez.