Isabella, who had some knowledge of chemistry, discovered, by touching the coins with nitric acid, that several of them were of gold, and consequently of great value. Caroline also found out that many of the coins were very valuable as curiosities. She recollected her father’s having shown to her the prints of the coins at the end of each king’s reign, in “Rapin’s History of England;” and upon comparing these impressions with the coins found by the orphans, she perceived that many of them were of the reign of Henry the Seventh, which, from their scarcity, were highly appreciated by numismatic collectors. Isabella and Caroline, knowing something of the character of Mr. Hopkins, the agent, had the precaution to count the coins, and to mark each of them with a cross, so small that it was scarcely visible to the naked eye, though it was easily to be seen through a magnifying glass. They also begged that their father, who was well acquainted with Mr. Harvey, the gentleman to whom Rossmore Castle belonged, to write to him, and tell him how well these orphans had behaved about the treasure which they had found. The value of the coins was estimated at about thirty or forty guineas. A few days after the fall of the chimney at Rossmore Castle, as Mary and her sisters were sitting at their work, there came hobbling in an old woman, leaning on a crab stick, that seemed to have been newly cut. She had a broken tobacco-pipe in her mouth; her head was wrapped up in two large red and blue handkerchiefs, with their crooked corners hanging far down over the back of her neck, no shoes on her broad feet, nor stockings on her many-coloured legs. Her petticoat was jagged at the bottom, and the skirt of her gown turned up over her shoulders, to serve instead of a cloak, which she had sold for whisky. This old woman was well known amongst the country people by the name of _Goody Grope_: {12a} because she had, for many years, been in the habit of groping in old castles, and in moats, {12b} and at the bottom of a round tower {12c} in the neighbourhood, in search of treasure. In her youth she had heard someone talking, in a whisper, of an old prophecy, found in a bog, which said that before many “St. Patrick’s days should come about, There would be found A treasure under ground, By one within twenty miles round.” This prophecy made a deep impression upon her. She also dreamed of it three times: and as the dream, she thought, was a sure token that the prophecy was to come true, she, from that time forwards, gave up her spinning-wheel and her knitting, and could think of nothing but hunting for the treasure, that was to be found by one “within twenty miles round.”