Sicily, as described by recent Italian authorities, contains about two thirds as many inhabitants as the State of New York, or a little over two millions, and a territory of 26,582,59 kilometers. A chain of mountains through the northern part appears to be a continuation of the Appenines, and the highest peak is the volcano of Etna, otherwise called Mongibello. The island is the largest in the Mediterranean, extending from N. latitude 36° to 38° 8´, and E. longitude 10° 5´ to 13° 20´. It has always been celebrated for the fertility of its soil, and was long called the granary of Rome. It contains several provinces, named from their chief cities Palermo, Messina, Catania, Trappani, Syracuse or Boto, Girgenti and Caltanissetta. The city of Palermo has 483,206 inhabitants; Catania, 56,515; Messina, 93,822; and Syracuse, 16,916. The land is but little divided, and all the province of Trappani is possessed by only three proprietors. In consequence of bad government, Sicily has only 126 persons to a square kilometer, and the rest of the late kingdom of Naples 87, while Tuscany has 126. In 20 years, under a free government, it may double its population. There were, last year, in Sicily, 17,000 secular priests, 7,591 monks, and 8,675 nuns. Total, 33,976 drones in the hive. Many of those joyfully joined the revolution on Garibaldi's appearance, and gave money from their treasures, and offered their church bells to melt into cannon, preached, and even fought for liberty and Victor Emanuel. ------------------------------------------------------------------------ CHAPTER VII. "Native hills and plains are ringing, With the sounds of joy once more; Charming echos send the music, From Alps to far Sicilla's shore."— _Banks of Dora._ ACCOUNTS OF THE EXPEDITION FOR SICILY—VOYAGE—TOUCH AT TALAMONE, IN TUSCANY—PROCEED TO MARSALA—LANDING—MARCH —OCCURRENCES ON THE WAY TO PALERMO. For the following interesting accounts of Garibaldi's expedition to Sicily, its arrival and operations, we copy from some letters published in English papers. Being written on the spot, by intelligent eye-witnesses, they are well adapted to our use: DEPARTURE OF THE EXPEDITION.