In these maps, the Azores are usually depicted vertically aligned, on a north–south axis, nine islands in three clusters. The island names, in order (from south to north) are usually (with their tentative translation):  bottom cluster: middle cluster: top cluster:  It is notable that two of the names – "San Zorzo" and "Corvis Marinis" – would be transferred to the modern Azorean islands. Only Graciosa seems to be routinely missing on these maps. The Madeira archipelago also appears on most of these same maps, with their modern names: "legname" (Ligurian for "wood", Madeira), "porto sancto" (Porto Santo), "desertas" (Desertas) and "salvazes" (Savage Island). The source of this information is a mystery. It could simply be derived from pure legend, possibly of Andalusian Arab origin e.g. al-Idrisi speaks of an Atlantic island of wild goats (the Caprera?) and another of "cormorants", a scavenger bird (the "sea crows" of Corvis Marinis?) But outside their erroneous axial tilt, the Azores do seem clustered with reasonable accuracy. From this cartographic record, there seems little doubt that both Madeira and the Azores were discovered, or at least sighted, during the 14th century, well before their official discovery dates. One (unproven) hypothesis is that the Azores were discovered in the course of a mapping expedition in 1341 to the Canary Islands, sponsored by King Afonso IV of Portugal, and commanded by the Florentine Angiolino del Tegghia de Corbizzi and the Genoese Nicoloso da Recco. Although not quite described in the 1341 report, Madeira and the Azores might nonetheless have been seen from a distance on the expedition's return via a long sailing arc ("volta do mar") from the Canary islands. Even if they were not discovered by the mapping expedition of 1341 itself, the islands may have been found by any of the numerous Majorcan expeditions that were launched into the Atlantic Ocean in the aftermath, destined for slaving runs on the newly mapped Canary islands. Regardless of who sighted them during the 14th century, there seems to have been no follow-ons until the 15th century. In the late 14th century, many maps appeared showing fictitious islands in the Atlantic.