The stream crossed by Exceat Bridge is the /Cuckmere/, of which it need only be said that it has ceased to be a feature of importance to shipping people. It is worth while, nevertheless, to follow it up from the reaches where barges still find resting-place. At Alfriston British, Roman, and Saxon coins have been found; there is a rare sixteenth-century inn, supposed to have been built as a house of call for Canterbury pilgrims, a market cross, a church on the plan of a Greek cross, sometimes designated "the cathedral of the South Downs," a parish register dating from 1512--possibly the oldest in England--and a half-timbered rectory of still earlier date. There is some doubt as to which is now the smallest church in Great Britain, but the claim has been made for Lullington, which is on the slope of Cuckmere vale. In rambling by this little river the tourist will make acquaintance with the South Downs free and unadulterated. The Cuckmere flows into the sea about two miles from Seaford, having escaped through the opening which takes the name of Birling Gap. * * * * * Within an area of four square miles, and almost in touch with St. Leonard's Forest, three important Sussex streams take their rise--the Ouse, Adur, and Arun. This was the centre of the ancient iron industry of Sussex, and the position would not have been possible without water supply for the hammer ponds. The /Ouse/ is crossed by the London and Brighton Railway a little north-west of Lindfield. The river afterwards winds round the well-wooded seat of the Earl of Sheffield; and at Fletching Common, hard by, the baronial army spent the night before fighting the battle of Lewes. Gibbon the historian was buried in the church, which is noted also for an ancient rood screen and the mausoleum of the Neville family. Maresfield, where the furnaces and forges of the old Sussex iron-masters clustered thick, retains vast expanses of the cinder and slag they created centuries ago. It is beautified by the trees of Ashdown Forest, and sends a tributary to the Ouse; another tributary presently arrives from Buxted, where the first cast cannon ever seen in Europe was made in 1543.