"The feud between the Colombian writer Gabriel García Márquez and Peruvian writer Mario Vargas Llosa, onetime best of friends, had all the elements of a literary classic: accusations of betrayal, jealousy and adultery, and a brutal encounter 31 years ago when things turned bloody. What it had lacked, however, was a wealth of documentary evidence. That all changed this month with the publication of two black-and-white portraits taken on Valentine's Day, 1976 in Mexico City that show Mr. García Márquez with a shiner - in turns smiling and serious - two days after being slugged by Mr. Vargas Llosa."