David A. Riggs:
Dunbar Sandstone Mines 076
David A. Riggs:
Dunbar Sandstone Mines 077
David A. Riggs:
Dunbar Sandstone Mines 078
David A. Riggs:
Dunbar Sandstone Mines 079
David A. Riggs:
Dunbar Sandstone Mines 080
David A. Riggs:
Dunbar Sandstone Mines 081
David A. Riggs:
Dunbar Sandstone Mines 082
David A. Riggs:
Dunbar Sandstone Mines 083
David A. Riggs:
Dunbar Sandstone Mines 084
David A. Riggs:
Dunbar Sandstone Mines 085
David A. Riggs:
Dunbar Sandstone Mines 086
David A. Riggs:
Dunbar Sandstone Mines 087
David A. Riggs:
Dunbar Sandstone Mines 088