The wall led south by the line of the street now called the Minories to the Tower, thus dividing Great Tower Hill, which was within the wall, from Little Tower Hill, which was outside. The Abbey of Nuns of the Order of St. Clare, which was situated outside the city walls, gave its name of Minoresses to the street. When William the Conqueror built the Tower he encroached upon the city ground, a proceeding which was not popular with his subjects. Near Tower Hill, that is out of George Street, [Illustration: ALDGATE AND PRIORY OF THE HOLY TRINITY. (_From Newton's Map of London._)] Trinity Square, there is a fine fragment of the old London wall. We must now turn westward and follow the course of the river from the Custom House to the Blackfriars, as this forms the southern boundary of the city. A little to the west of the Tower gate was Galley Quay, where, according to Stow, 'the gallies of Italie and other parts were used to unlade and land their merchandises and wares.' These strangers, inhabitants of Genoa and other parts, lodged, says Stow, in Galley Row, near Mincing Lane. They 'were commonly called galley-men, as men that came up in the galleys, brought up wines and other merchandises, which they landed in Thames Street, at a place called Galley Key; they had a certain coin of silver amongst themselves which were halfpence of Genoa, and were called galley halfpence; these halfpence were forbidden in the 13th of Henry IV., and again by Parliament in the 4th of Henry V.... Notwithstanding in my youth I have seen them pass current, but with some difficulty, for that the English halfpence were then, though not so broad, somewhat thicker and stronger.' Next Galley Quay was Bear Quay, appropriated chiefly to the landing and shipment of corn. The first Custom House of which we have any account was built by John Churchman, Sheriff of London in 1385, and stood on 'Customer's Key,' to the east of the present building, and therefore much nearer Tower Wharf. Another and a larger building was erected in the reign of Elizabeth, and burnt in the Great Fire of 1666. Wren designed the third building, which was completed in 1671 and destroyed by fire in 1718. Ripley's building, which succeeded this, was destroyed in the same way in 1814. The present is therefore the fifth building devoted to the customs of the country.