St. Catherine's Well, at Liberton, near Edinburgh, has been regarded for centuries as a remedy for diseases of the skin, and is still frequented by persons suffering from them. It derives its name from a tradition, preserved by Boece, in his chronicle of Scotland, that the spring rose miraculously from a drop of oil brought from the tomb of St. Catherine of Alexandria on Mount Sinai, and this story was considered to be countenanced by the fact that drops of oil are often observable on the surface, a phenomenon now regarded as due to the decomposition of coal, or bituminous shale, in seams below. Boece says that Queen Margaret, the wife of Malcolm III., built a chapel near the spring, and dedicated it to St. Catherine; but this chapel, some remains of which were still standing at the close of the last century, was dedicated to St. Catherine of Sienna, not to her sister saint of Alexandria. Before the Reformation, the nuns made an annual visit to the well, three miles from their convent, in solemn procession, a ceremony due perhaps to the coincidence of name. James IV. made an offering in this chapel in 1504, and when James VI. returned to Scotland in 1617, he visited the well, and, as Sir Daniel Wilson relates in his "Memorials of Edinburgh in the Olden Time," he "commanded it to be enclosed with an ornamental building, with a flight of steps to afford easy access to the healing waters; but this was demolished by the soldiers of Cromwell, and the well now remains enclosed with plain stone-work, as it was partially repaired at the Restoration." St. Bernard's Well, a sulphurous spring in the valley below Dean Bridge, Edinburgh, is traditionally associated with the sainted Abbot of Clairvaux. Its medicinal virtues appear to have escaped notice, however, until 1789, when the property on which it is situated came into the possession of Lord Gardenstone, who erected a handsome Grecian edifice over the spring, set up within it a statue of Hygeia, and appointed an attendant to dispense the water at a very trifling charge. The place then became a popular resort for the purpose of drinking the water, and in 1889 the statue of the Roman goddess, having become decayed, was replaced by one in marble, by the generosity of the late William Nelson, who also restored the temple and made the surroundings more attractive. On Soutra Hill, the westernmost point of the Lammermoor range, there once stood a hospital founded by Malcolm IV., for the reception of poor travellers, and dedicated to the Trinity. Only a small portion of the building now remains, but near it is a spring known as Trinity Well, which in former times was much frequented on account of the healing virtues attributed to it. A similar reputation was enjoyed for a long time by St. Mungo's Well, on the west side of the hill named after that famous Scottish saint, in the parish of Huntley, Aberdeenshire.