The Grave of the Dwarf

Tara had three wonders; but as the first was in no degree important I will omit it. The second was the grave of the Dwarf. If you went to measure it you found its length exactly three lengths of your foot; if another person with a different sized foot did the same, he found it to answer the length of his foot in like manner. In short whoever measured this marvellous little grave, whether man or boy or child, found that it was exactly three times the length of his foot, neither more nor less.