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chief danger to which the miners were exposed. They met with a little chokedamp sometimes, but never with the explosive firedamp so common in coal mines. Hence they were careful as soon as they saw any appearance of water.
As the result of his reflections while the goblins were busy in their old home, it seemed to Curdie that it would be best to build up the whole of this gang, filling it with stone, and clay or lime, so that there should be no smallest channel for the water to get into. There was not, however, any immediate danger, for the execution of the goblins' plan was contingent upon the failure of that unknown design which was to take precedence of it; and he was most anxious to keep the door of communication open, that he might if possible discover what that former plan was. At the same time they could not resume their intermitted labours for the inundation without his finding it out; when by putting all hands to the work, the one existing outlet might in a single night be rendered impenetrable to any weight of water; for by filling the gang entirely up, their embankment
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