The coupé stopped accordingly by a small open square, planted with grass and a few trees, and intersected with paths. There was a music-stand in the centre, a statue on a pedestal; and close by them, rising from the greensward, appeared a small, curious structure of stone. It was a roofless circular tower, supported on round arches, which made a series of openings about its base. Cannie had never heard of the Stone Mill before, and she listened eagerly while Mrs. Gray explained that it had stood there since the earliest days of the Colony; that no one knew exactly how old it was, who built it, or for what purpose it was built; and that antiquarians were at variance upon these points, and had made all sorts of guesses about its origin. Some insisted that it was erected by the Norsemen, who were the first to discover the New England shores, long before the days of Columbus; others supposed it to be a fragment of an ancient church. Others again--and Mrs. Gray supposed that these last were probably nearest the truth--insisted that it was just what it seemed to be, a mill for grinding corn; and pointed out the fact that mills of very much the same shape still exist in old country neighborhoods in England. She also told Cannie that the mill used to be thickly overhung with ivies and Virginia creepers, and that it had never been so pretty and picturesque since the town authorities, under a mistaken apprehension that the roots of the vines were injuring the masonry, had torn them all away and left the ruin bare and unornamented, as she now saw it.