| 1089 |
Proposed Tunnels Under Detroit River |
Unknown |
1870-06-04 |
| 1938 |
Thomee de Gamond's Submarine Tunnel With Sea Station on the Cliff of Varne [The Two Plans for Connecting Calais With Dover] |
Unknown |
1875-06-05 |
| 1939 |
The Outline of the Projected Tunnel [The Two Plans for Connecting Calais With Dover] |
Unknown |
1875-06-05 |
| 2529 |
The Mount Cenis Tunnel. View Near Modane |
Derdy, A.; Smeeton |
1872-03-23 |
