Other claimed Norse artifacts in the area south of the St. Lawrence include a number of stones inscribed with runic letters. The Kensington Runestone was found in Minnesota, but is generally considered a hoax. The authenticity of the Spirit Pond runestones, recovered in Phippsburg, Maine, is also questioned. Other examples are the Heavener Runestone, the Shawnee Runestone, and the Vérendrye Runestone. The age and origin of these stones is debated, and so far none has been firmly dated or associated with clear evidence of a medieval Norse presence. In general, script in the runic alphabet does not in itself guarantee a Viking age or medieval connection, as Dalecarlian runes have been suggested to have been used until the 20th century.