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.