From the time we left Graciosa the sky remained so consistently hazy that despite the height of the mountains of Gran Canaria we did not make out the island until the evening of the 18th. It is the granary of the archipelago of the Fortunate Islands and, remarkably for an area outside the Tropics, there are two wheat harvests a year, one in February, the other in June. Gran Canaria has never been visited before by a geologist, yet it is worth observing because its mountains differ entirely from those of Lanzarote and Tenerife.