Don't you remember that I told you that once before?
Oh yes.

But I see no coal between them there.
No.

But there is plenty of coal between them over in Wales; and plenty too between them on the other side of Bristol.

What you are looking at there is just the lip of a great coal-box, where the bottom and the lid join.

The bottom is the mountain limestone; and the lid is the new red sandstone, or Trias, as they call it now: but the coal you cannot see.