Touching this most interesting Gozo tower, which it is not unreasonable to say may have stood here for some three thousand years, it shows that the builders, whoever they were, did their work thoroughly. It is entered by two massive doorways, twenty feet in height and five or six wide. The interior is cut up into various apartments, the use of which can only be conjectured. The diameter of the whole is about ninety feet, a considerable portion being paved with large, hewn stones. The whole is supported by a foundation which no earthquake has yet been able to undermine, though, as we are aware, the island has experienced many shocks. CHAPTER VII. A Maltese Fishing Hamlet.--Old Fort Chambray.--A Grotto shorn of Poetic Adornment.--The "Azure Window."--Bay of Scilendi.--Pirates' Caves.--Prehistoric Bones and Skeletons.--The Vast Changes of Land and Sea.--Suez Canal.--Geological Matters.--Native Race of Arabic Descent.--Curious Stone Mortars.--Primitive Artillery. --Maltese Fungus.--Springtime.--Riches of the Harvest. --Origin of the Island of Gozo. The Bay of Migiarro, which means "the carting place," is the commercial port of Gozo, so to dignify it, and was once considered of sufficient importance to cause the Knights to erect a substantial stone tower or fort for its defense. This is now in ruins, but the place has become a busy and populous settlement, whose interests centre upon the fisheries of this coast. The beach is a fine one, much resorted to for bathing purposes. Close at hand, southward, is the grand cliff of Ras-el-Taffal, a promontory nearly two hundred feet in height, crowned by old Fort Chambray, which was named for the member of the brotherhood of St. John whose liberality built it. He was a very rich Knight from Normandy, and when he died, he left one fifth of his large estate to finish this defensive work. The whole sum was required, and much more besides, to complete the well-designed and elaborate fort. It was begun in 1749, and was many years in course of construction, but it is now gradually crumbling away, not being considered of importance. Notwithstanding their many ancient monuments, the object which seems to be of the most interest to the inhabitants and to tourists is the Grotto of Calypso. This is a rocky fissure on the northwestern shore of the island, situated about a league from Rabbato, and is the spot where the grotto is supposed to have existed. It is now only a simple limestone cavern, presenting no peculiarities worthy of detail. It has the usual stalactitic incrustations and developments, recalling the much more extensive caves of the same nature which the traveler sees at Matanzas, Cuba. It is quite isolated, but is constantly visited by small parties from Valletta, who drink in romantic ideas from the associations of the place, and refreshment from the clear, sparkling spring which meanders through the cave of the defunct goddess,--