During the NAMHO (National Association of Mining History Organisations) Conference 2022 which took place at nearby Grosmont
in the North York Moors National Park, we visited a mine at Hutton Lowcross just outside Guisborough.  Here jet stone was mined
for use as jewellery which became popular in the 19th century following the death of Prince Albert when Queen Victoria adopted
the stone as her "mourning jewellery".  We undertook a through trip of the mine which has numerous side passages.  Due to the
complex nature of the mine the route was marked by a rope throughout.

WARNING:  Due to the highly complex nature of Hutton Lowcross Jet Mine and other similar mines, there is a
very real danger of getting lost when exploring jet mines.  At Hutton Lowcross a rope is laid throughout the
route of the through trip.  It is imperative that you do not lose sight of the guide rope.