The mine consists of a clear corridor, often with a hairpin turn.

The mine consists of a long corridor that runs though the leaf two to three times.

The mine consists of a long, hair thin, winding corridor.

The mine consists of an early gallery, which is relatively straight.

The mine consists of a very gallery, usually running along a vein for some distance.

The mine consists of a fairly long, rather slender corridor.

The mine consists of a blotch which can be found in December.

The mine consisted of three horizontal veins, each deeper than the last.

The mine consists of a wandering gallery in the leaf.

The mine consists of corridor which is not widened at the end.