No attempt was made during the lifetime of the Duke to dispute the legality of the union; neither he nor Elizabeth had the least doubt that the former marriage had been legally dissolved. But when the Duke left all his great fortune to Elizabeth, then his nephews were furious, and raked up against her the charge of bigamy, on the grounds that the sentence of the Consistory Court was invalid. She was tried in Westminster Hall before her peers in 1776, and the trial lasted five days. The penalty for bigamy was death, but she could escape this sentence by claiming the benefit of a statute of William and Mary, which commuted death to branding in the hand and imprisonment. The peers found her guilty, but she escaped punishment by flying to the Continent, where she died in 1788.[19] Harford Hall, where she resided, has about it no architectural features; it never can have been other than a small mansion, and is now a mere farmhouse. The trees around it alone indicate that it was at one time a gentleman's seat. If now we strike across Stall Moor to the Yealm we come on Yealm Steps, where the river falls over a mass of granite débris. Here are two blowing-houses, one above the steps and the other below. The lower house on the eastern side of the stream is a mere heap of ruins with, however, the door-jamb standing and facing the north.[20] No wheel-pit is visible, but there are traces of a watercourse at a high level to the north-east of the hut. Near the entrance is a stone with one perfect mould in it, and another imperfect. A second mould-stone is lying near an angle in the eastern wall of the house. It has in it two moulds adjoining each other--one at a lower level than the other, and connected by a channel. The high-level cavity is 15 inches long, 8 inches wide, and 3 inches deep. At one end is a groove one inch deep, perpendicular, and running down the side of the mould three inches; that is, from top to bottom. The low-level mould is 17 inches long, 12 inches wide, and 5 inches deep. These cavities have been used for the purification of tin, for the molten metal mixed with furnace impurities poured in on the high-level hollow would flow in a purer condition into the low-level mould. This blowing-house has been excavated, somewhat superficially, but nothing was found in it to give token of the period to which it belonged. About a quarter of a mile further up the river, but on the western bank, is another ruin. The doorway, which is very imperfect, is on the eastern side. One mould-stone remains, containing a mould 17 inches long, 12 inches wide, and from 4 to 5 inches deep.