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Merrill slate quarry Brownville NYPL bGF B. en Merrill slate quarry Brownville nypl org Scan by NYPL Merrill slate quarry Brownville Scenery in Northern Maine The Miriam and Ira Wallach Division of Art Prints and Photographs Photography Collection ecdfbecdabc GFB Robert Dennis collection of stereoscopic views debadeeaa NYPGF repo