John Forbes, Transactions of the Provincial Medical and Surgical Association (1834)
“ A mine thus consists of a series of horizontal galleries generally one above the other, but sometimes running parallel, traversed at irregular intervals by vertical shafts, and all communicating together, either directly or indirectly. A person unacquainted with the details of mining, on hearing of many hundreds of men employed in a single mine, might naturally imagine that a visit to its recesses would afford a picturesque and imposing spectacle of gregarious labour and bustle, tremendous noise, and much artificial brilliancy to cheer the gloom. ”
