When we walked round the mosque to examine it in detail, we were shown the mark said to have been made by the hand of Sultan Mahmoud when he placed it upon one of the great columns in token that he took possession of the stronghold of the Christian faith. As the spot indicated, however, is at least fifteen feet from the ground, we permitted ourselves to doubt the accuracy of the statement. After leaving Santa Sophia we passed through the largest square in Constantinople, called Ak' Meidan, or the "place of meat." Here it was that the Janissaries were put to death by the orders of Sultan Mahmoud. This wholesale massacre, fearful as it was, and cruel as it seemed, nevertheless delivered Turkey from one of its greatest scourges, for such was the rapacity, the cruelty, and the overbearing insolence of these famous troops, that no man's life or property was safe for an hour, and the whole country groaned under a tyranny more oppressive than any it had ever known. After Santa Sophia, the finest mosque in Constantinople is that of Sultan Ahmed. It is a large and handsome building; its six tall, graceful minarets giving much beauty to the exterior, whilst the interior is chiefly remarkable for the eleven gigantic columns that support the roof. The mosque possesses some very fine Korans all richly bound in velvet, some of them even encrusted with pearls and precious stones. There is also a magnificent collection of jewelled cups that have been presented by various sultans and by many rich pashas. When we issued forth from the cool freshness of the shady mosque, the burning glare of the sun seemed doubly oppressive. We were thankful even to climb into the little telega that was awaiting us; fleas and tight squeezing seeming slight evils compared with the scorching heat and blinding vividness of the sun's rays. When we halted at the beautiful fountain of Ahmed the Third, never did water and marble look more delicious and refreshing. This celebrated fountain is one of the most beautiful little buildings in Constantinople. It is an octagon made of white marble, the projecting roof extending far beyond the walls. Where gilt lattice-work has not been let into the sides they are covered with inscriptions in gold letters, extolling the virtues of the treasure it contains; for the waters of the Fountain of Ahmed are said to excel in freshness and purity even those of the Holy Well of the Prophet at Mecca, and have been in many poems compared to the Sacred Fount whose eternal spring has its rise in Paradise itself. On a little marble slab outside the building are arranged rows of brass cups full of the fresh water so precious to the hot and weary passenger in Constantinople.