According to tradition "Plant Mat," or "Plant y Fat," were two sons and a daughter of one Matthew Evans, who kept a public house at Tregaron in the seventeenth century. These persons became highway robbers and lived in a cave near Devil's Bridge. The entrance to the cave admitted only one person at a time and this enabled the robbers to keep out hundreds when they were attacked. It seems that they had some notion of honour, for it is said that if either had a friend, he gave him his glove, which served as a passport when stopped by the others. They lived for some years in this cave, but at last they were executed for murder. One of them was captured near Hereford, just as he was giving out the well-known hail of "Deliver or die." These robbers are also credited with the attributes of the fairies. TWM SHION CATTI'S CAVE. "Mae llefain mawr a gwaeddi, Yn Ystradffin eleni; Mae'r ceryg nadd yn toddi'n blwm, Rhag ofn twm Sion Catti." (In Ystradffin a doleful sound Pervades the hollow hills around; The very stones with terror melt, Such tear of Twm Shion Catti's felt.) This cave, which is near Ystradffin, on the borders of Carmarthenshire and Cardiganshire, was once, says tradition, the stronghold of Twm Shion Catti, or to give him his proper name Thomas Jones. This Thomas Jones, or Twm Shion Catti, lived at Tregaron in the time of Queen Elizabeth. It seems that he had been in his younger days a freebooter, but reformed and became a celebrated bard, antiquary and a genealogist. The legends which have gathered round the name of this eminent man, are still retained in the memory of the people in Cardiganshire and Carmarthenshire, and the late Mr. T. J. L. Prichard, of Llandovery, made him the hero of a most popular romance, into whose book the stories have been introduced, and embellished. OWEN LAWGOCH'S CAVE. This cave is in the limestone rock of Dinas, Llandebie, in Carmarthenshire, respecting which there is a story that a great warrior named Owen Lawgoch and his men fell asleep in it, but who are some day to awake and sally forth. A version of the legend is given in the Brython for 1858, page 179, by the late Gwynionydd, and an English translation of the same story is given by Sir John Rhys in his "Celtic Folk-Lore." "Not the least of the wonders of imagination wont to exercise the minds of the old people was the story of Owen Lawgoch. One sometimes hears sung in the fairs the words:-- 'Yr Owain hwn yw Harri'r Nawfed Sydd yn trigo 'ngwlad estroniaid, etc.' (This Owen is Henry the Ninth Who tarries in a foreign land, etc.)