"You remember the story in Selden's Table-Talk of Sir Robert Cotton and others disputing about Moses's shoe. Lady Cotton came in and asked, 'Gentlemen, are you sure it is a shoe?' So the first thing is to convince mankind that there is a set of creatures, a degree or so finer than we are, to whom we have given the name of "knockers" from the sounds we hear in our mines. This is to be done by a collection of their actions well attested, and that is what I have begun to do, and then let everyone judge for himself." We do not hear of "Knockers" in Cardiganshire now; in Cornwall, however, it is said that they still haunt the mines, and sometimes, with a sound of knocking and singing, they guide a lucky miner to find good ore. The "Knockers" were, it was once thought, "the Souls of the Jews who crucified our Saviour." At least it seems that that was the belief in Cornwall. Perhaps it would be of interest to add that there were Cornishmen among the miners of Cardiganshire when Mr. Lewis Morris wrote the two letters I have just given. A STORY OF PONT EINION (EINION BRIDGE) TREGARON. Mr. John Jones, Pontrhydfendigaid, who is now about 95 years of age, related to me the following tale seven years ago:-- Long ago, when much of the land where now stand the farms of Ystrad-Caron, Penylan, and Penybont, was a Common, a gentleman named Einion, and his wife, came from Abergwaun (Fishguard) and settled in the neighbourhood of Tregaron. Einion inclosed much of the land on the banks of the river Teivy in that part, and built a fine mansion which he called Ystrad-Caron, and soon became a most influential man in the neighbourhood, especially as he was well-to-do, and had generously constructed at his own expense, a bridge over the river for the convenience of the poor people of Tregaron and the surrounding districts. He also loved above everything his wife, and his harp, and was considered one of the best players on that instrument in Wales; but, unfortunately, as time went on, he failed to derive any pleasure from his surroundings and soon became subject to "melancholia," imagining that the place was haunted by some evil genius. At last, he was persuaded by his medical adviser to seek a change of scenery by going to stay for a while in Pembrokeshire, his native place. Soon after his arrival at Fishguard, he took a short sea voyage from that port, but after some adventures, he and others of his fellow passengers were taken prisoners by a French Man of War. After spending many years of his lifetime inside the strong walls of a French prison, he at last succeeded to escape, and soon found his way once more to the neighbourhood of Tregaron in Cardiganshire; but to his great astonishment, as he neared his own house, Ystrad-Caron, after so many years' absence, he heard some music and dancing.