| http://www.w3.org/ns/prov#value | - In fact, Ellsworth Cowles and William Ritchie referred to these shapes as muller stones" ... or basically a grinding tool...But I have to ask why they are so perfectly round and many are so polished...some in fact do not show wear on the edges like other grinding tools.I also think that it is important to note that in 1883 and 1916 respectively, the Murray Garden and the Murray Farm in Athens, PA
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