James Yonge's map of Ferryland, ca. 1663.
Although Yonge made no reference of such structures on his map, archaeologists have uncovered the remains of the 17th-century waterfront which was once part of the Colony of Avalon.
From F.N.L. Poynter, ed., The Journal of James Yonge, 1647-1721, Plymouth Surgeon (London: Longman, Green & Co. Ltd., ©1963) Plate 4 A: "Part of the coast of Newfoundland, showing Ferryland", facing 81.