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BTC Annual Report 16, 1910 Plate 03: Beacon Hill Tunnel Cross Sections
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BTC Annual Report 16, 1910 Plate 05: Beacon Hill Tunnel Portal
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BTC Annual Report 16, 1910 Plate 06: Beacon Hill Tunnel, Shield
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BTC Annual Report 16, 1910 Plate 07: Beacon Hill Tunnel, Rear of Shield
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BTC Annual Report 16, 1910 Plate 08: Beacon Hill Tunnel, Northern Drift
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BTC Annual Report 16, 1910 Plate 09: Beacon Hill Tunnel, Lower Part of Shield
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BTC Annual Report 16, 1910 Plate 10: Beacon Hill Tunnel, Upper Part of Shield
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BTC Annual Report 16, 1910: Title Page
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