These are the marvels of nature. But by the river of Cong, which divides Mayo from Galway, stands one of the most beautiful ruins in the west--all that is left of what was once St. Fechin's monastery. But St. Fechin belongs to the old days of the seventh century, long before any builder in these islands had the skill to construct that graceful cloister. The abbey which we know is pre-Norman, an Augustinian foundation, and it has a special interest, for to its repose came Rory O'Connor, last of the native kings to claim sovereignty over all Ireland. Already he had been sorely driven and harried by the Norman invaders, before he retired here in 1183 to spend yet fifteen years more of his life. It was doubtless he who made it into the gem of the western dioceses; and in all the changes and chances of the centuries there still was an abbot of Cong till a date hardly outside living memory. In Cong, too, was treasured--or rather was heedlessly kept--the most famous of all the jewels which descend from the ancient craftsmanship of Ireland. The cross of Cong, a reliquary, made to be borne in procession, enclosing a fragment of the true cross, stands two feet and a half in height and is covered with gold tracery of the most incredible complexity and fineness. What the artist could do with his fine pointed brush in the Book of Kells, this artificer could almost rival in his twisting of the delicate wire. The thing is priceless and was bought (in a transaction of doubtful morality) for the Royal Irish Academy through Wilde's agency. But in truth the National Museum in Kildare Street where it reposes is the proper place for it: though one cannot but feel sympathy for the zealous young priest who made his way from Cong to Dublin, boldly smashed the case and rushed into the street with the reliquary, prepared at all hazards to bring it back to the home which it had known for seven centuries. [Illustration: ON THE OWENBRIN RIVER, LOUGH MASK] A stone now set up in the street at Cong commemorates in a Gaelic inscription two Abbots of Cong, Nicol and Gillibard O'Duffy, and I hope that one of them may be the O'Duffy to whose order the cross was made--not in Cong, but in the other abbey of Roscommon, by the cunning craftsman whose name is inscribed on its arms: MAELISU MACBRADDAIN O-H-ECHAN.