At the foot of the street is the (probably dry) bed of the Winterbourne, so called because, like other streams of the chalk country, it flows at intermittent times. A short distance farther, to the right, and just past St. John's Church, will be found the entrance to the space once occupied by the first Priory of the Cluniacs in England.

Founded in 1078 by William de Warenne and his wife Gundrada and dedicated to St. Pancras, the Priory was always closely allied with the parent house on the continent. At the Dissolution more than the usual vandalism seems to have been observed and Cromwell's creatures must have vented some personal spite against the monks in their wholesale demolition of the buildings. A mound to the north-east is supposed to be the site of a calvary, and until quite recently a "colombarium" or dovecote was allowed to stand which contained homes for over three thousand birds.

"The Priory building was probably irregular, varying in its form as the increase of inmates demanded additional room. But though irregular, it was certainly a noble edifice, faced with Caen stone, and richly adorned by the chisel of the sculptor. Its walls embraced an area of 32 acres, 2 rods, 11 perches, and it was not less remarkable for its magnificence than extent. The length of the church was 150 feet, having an altitude of 60 feet. It was supported by thirty-two pillars, eight of which were very lofty, being 42 feet high, 18 feet thick, and 45 feet in circumference; the remaining twenty-four were 10 feet thick, 25 feet in circumference, and 18 feet in height.[ [1] ] The belfry was placed over the centre of the church, at an elevation of 105 feet, and was supported by the eight lofty pillars above mentioned. The roof over the high altar was 93 feet high. Its walls were 10 feet thick. On the right side of the high altar was a vault supported by four pillars, and from this recess branched out five chapels that were bounded by a wall 70 yards long. A higher vault supported by four massive pillars, 14 feet in diameter, and 45 feet in circumference, was probably on the left side of the high altar, and corresponded with the one just mentioned, from which branched out other chapels or cells of the monks. How many chapels there were cannot be ascertained; the names of only three are known, the Virgin Mary, St. Thomas the Martyr, and St. Martin. The chapter-house and church were by far the most splendid apartments of this stately pile; the latter was richly adorned by the painter and the sculptor."

The wooden chapel of St. Pancras which existed here in Saxon times probably stood where later the high altar of the great Norman church was reared, and across this site the Eastbourne trains now run. The station itself is supposed to be on the site of the convent kitchens and consequently the present ruins are very scanty. Though the foundations laid bare at the cutting of the railway in 1845 show the great extent of the buildings, the battered walls which now remain give but little indication of the imposing dimensions quoted above, and the visitor will have to depend on sentiment and the imagination rather than on actual sightseeing. The excavators in 1845 had a gruesome experience, for they discovered a charnel pit containing thirteen cart loads of bones of the fallen warriors at the battle of Lewes. Although nearly six centuries had elapsed the stench was dreadful.

That the archaeological interest of Lewes owes much to the making of the railway will now be seen.

The following account appeared in the Gentleman's Magazine, 1845:—

"On the morning of Tuesday, October 28, a most interesting discovery was made by the workmen employed in forming a cutting for the Lewes and Brighton Railway, through the ground formerly occupied by the great Cluniac Priory of St. Pancras, at Lewes. It is well-known that the original founders, in 1078, were William de Warenne, Earl of Surrey, of a great Norman family, and his wife Gundred, the daughter of William the Conqueror and his Queen Matilda; that they pulled down an old wooden church to replace it by a stone one, and that after their deaths in 1085 and 1088, they were buried in the chapter-house of their Priory. So effectual, however, was the destruction of the buildings in 1537 by the Ecclesiastical Commissioners of Henry VIII that the very site of the church has been uncertain, and there has long been nothing visible of the ruins but a confused mass of broken walls and arches half buried under the soil. The bold intrusion of a railway into these hallowed precincts has thrown light upon this obscurity, and in the course of their excavations the workmen have found, covered by some slabs of Caen stone, two leaden chests containing the bones of the founders, and inscribed with their names. They are not coffins, but cists or chests, and are both of similar form and dimensions, ornamented externally by a large net-work of interlaced cords moulded in the lead. The cist of William de Warenne measures 2 feet 11 inches long, by 12½ inches broad, and is 8 inches deep, all the angles being squared, and the flat loose cover lapping an inch over. On the upper surface at one end is inscribed in very legible characters 'WillelMus.' The cist of the princess his wife is 2 inches shorter and 1 inch deeper, and the word 'Gvndrada' is very distinctly inscribed on the cover. It is worth remarking that her father, the Conqueror, in his charter, calls for Gundfreda, and her husband, who survived her, calls her Gundreda in his charter.

"It is obvious, from the length of these receptacles, that their bones have been transferred to them from some previous tombs, and it is not difficult to suppose that, the chapter-house not being built at the time of their deaths, the founders were buried elsewhere until its completion, and that the bodies were then found so decayed that their bones only remained for removal to a more distinguished situation, and were, on that occasion, placed in these very leaden chests. A rebuilding of the Priory Church was begun on the anniversary of William the founder's death in 1243, and from the antique form of the letters G and M the inscriptions cannot be fixed at a later period. The characters, indeed, more resemble the form used in the twelfth century. Of the genuine antiquity of these relics there cannot be the slightest doubt. It is locally notorious that the black marble slab which formerly covered the remains of Gundrada, beautifully carved and bordered with nine Latin verses in her honour cut in the rim and down the middle, was discovered in 1775 in Isfield Church, misappropriated as a tombstone over one of the Shirley family, and by the care of Sir William Burrel removed to the church of Southover, immediately adjoining the ruins of the Priory. It is very singular that now, after an interval of eight years, her very bones should be brought to the same church (under the superintendence of the Rev. Mr. Scobell) there to undergo a third burial under Gundrada's marble slab.