| 1 | Of everything. Including the upper superior mines, which it execrates. | |
| 2 | They have had the tunnel shored up with concrete. | |
| 3 | To make a tunnel through or under. | |
| 4 | The tunnel contract to a narrow passageway as you go deep. | |
| 5 | The end, as of a mine or tunnel, at which work is advancing. |
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