The maps index can help you locate a particular place on the maps. Each entry includes the map number followed by the grid reference composed of a letter-number combination. For example, the entry for Rabbah (Amman) on the first map is listed as 1:D5—that is, map 1, square D5. You can locate specific squares on each map by referring to the coordinates on the top and side of that map. Alternative names of places are listed in parentheses; for example, Rabbah (Amman). A question mark following a name indicates that the location shown on the map is possible or probable but not yet certain.