Now it was all a hole in the ground, and the force which blasted it out had then pulled the hole in behind itself.

We stood on the verge, looking downward into a chasm which seemed to split its way to infinite depths, although in fact it was probably not nearly so deep as it appeared.

If we looked upward there, forty feet above our heads, was a wide riven gap in the earth crust.
Near me I discerned a litter of metal fragments.

From such of the scraps as retained any shape at all, I figured that they had been part of the protective casing of a gun mounted somewhere above.

The missile which wrecked the gun flung its armor down here.