Having previously obtained permission of a viewer, or some other person concerned in the colliery, a small hand lanthorn must be provided, a light being necessary for each person. It is also advisable to take a change of dress, at least of upper cloaths; strong boots to keep the feet dry, and an old hat.
1944 September and October, Charles E. Lee, “An Ancient Underground Railway”, in Railway Magazine, page 275, text from early 19th century