He remembered the shapes of the clouds in the south at the dawn of the 30th of April of 1882, and he could compare them in his recollection with the marbled grain in the design of a leather-bound book which he had seen only once, and with the lines in the spray which an oar raised in the Rio Negro on the eve of the battle of the Quebrancho.” In the short story “Funes, the Memorious,” Jorge Luis Borges explores what it would be like to have a perfect memory.