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A Brandywine quarry
Quarry workers near Montchanin, Delaware
Limestone quarry, likely in Virginia
A Brandywine quarry
Interview with Les Mathewson, undated and 1976 September 3 [transcript]
Interview with Les Mathewson, undated [audio](part 4)
Interview with Les Mathewson, 1976 September 3 [audio](part 3)
Baseball or softball game in a quarry
Galt quarry near East Branch Brandywine Creek in Chester County, Pa.
Quarry south of 16th Street Bridge, Wilmington
Galt quarry near East Branch Brandywine Creek in Chester County, Pa.
Galt quarry near East Branch Brandywine Creek in Chester County, Pa.
McIlvain residence and Galt quarry near East Branch Brandywine Creek in Chester County, Pa.
Quarry at edge of Alapocas Run State Park on Granite Road in Wilmington, Del.
Quarry south of 16th Street Bridge, Wilmington
Limestone quarrying, Bethlehem Steel Corporation (Hanover, Pa.)
N. J. Silica Sand Company
N. J. Silica Sand Company
Van Sciver Sand Company, Falls Township, Pennsylvania
Van Sciver Sand Company, Delaware River Plant
New Jersey Pulverizing Company
Van Sciver Sand Company, Southwest Philadelphia
Warner Sand Company
Curtiss & Hill, Van Sciver Corporation, Morrisville, Pennsylvania
Van Sciver Sand Company

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