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.

Billingsgate must be of great antiquity, but it has not always held its present undisputed position. In early times Queenhithe and Billingsgate were the chief city wharfs for the mooring of fishing vessels and landing their cargoes. The fish were sold in and about Thames Street, special stations being assigned to the several kinds of fish. Queenhithe was at first the more important wharf, but Billingsgate appears to have gradually overtaken it, and eventually to have left it quite in the rear, the troublesome passage of London Bridge leading the shipmasters to prefer the below-bridge wharf. Corn, malt and salt, as well as fish, were landed and sold at both wharfs, and very strict regulations were laid down by the city authorities as to the tolls to be levied on the several articles, and the conditions under which they were to be sold.[21]

In 1282 a message was sent from Edward I to the Serjeants of Billingsgate and Queenhithe commanding them ‘to see that all boats are moored on the city side at night’; and in 1297 the order was repeated, but it was now directed to the warden of the dock at Billingsgate, and the warden of Queenhithe, who were ‘to see that this order is strictly observed.’

Opposite to Billingsgate, on the north side of Lower Thames Street, the foundations of a Roman villa were discovered in 1847 when the present Coal Exchange was built. A spring of clear water which supplied the Roman baths was found running through the ruins at the time of the excavations. This was the spring which supplied the boss, fountain or jet by the corner of an opening, of old called Boss Alley, where a reservoir was erected by Sir Richard Whittington, or his executors, expressly for the use of the inhabitants and market people.