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 The Walking Question Mark: Newsletter of the Grand River Heritage Mines Society, Jan 1994     The Grand River Heritage Mines Society was active from 1993 through 2005 with the goal of identifying and documenting all of the historic mines located within the Grand River valley. These newsletters document their activities, including archaeological digs and research into mine history. These newsletters were provided courtesy of the …

 The Walking Question Mark: Newsletter of the Grand River Heritage Mines Society, Apr 1994     The Grand River Heritage Mines Society was active from 1993 through 2005 with the goal of identifying and documenting all of the historic mines located within the Grand River valley. These newsletters document their activities, including archaeological digs and research into mine history. This issue includes an article on gypsum, …

 The Walking Question Mark: Newsletter of the Grand River Heritage Mines Society, Jul 1994     The Grand River Heritage Mines Society was active from 1993 through 2005 with the goal of identifying and documenting all of the historic mines located within the Grand River valley. These newsletters document their activities, including archaeological digs and research into mine history. These newsletters were provided courtesy of the …

 The Walking Question Mark: Newsletter of the Grand River Heritage Mines Society, Oct 1994     The Grand River Heritage Mines Society was active from 1993 through 2005 with the goal of identifying and documenting all of the historic mines located within the Grand River valley. These newsletters document their activities, including archaeological digs and research into mine history. This issue includes summaries of the Society's …