Iron-working was actively pursued on two of Byland’s granges – Bentley
and Denby - where the community was working forges by the late
twelfth century.(67) Iron was important
for the manufacture of a number of implements, including tools,
horseshoes and keys.
To manufacture iron, the community had to obtain
rights to work iron and to dig fuel to power the forges, and also
to negotiate
access to the mines and permission to transport the ore away
from the site. William of Denby’s grant to Byland of land
in Denby and pasture in Claverlay, stated that the iron ore here
could be
dug freely and that the community could have free entry and exit
to the area to transport the ore. William, however, was to have
this enclosure from May until harvest for his own soul and a
token payment of eighteen pennies.(68)
English lead
On several occasions in the late twelfth century, Henry II [1154-1189]
sent lead from Yorkshire and Derbyshire to help with the building
of the new church at Clairvaux.
It has been estimated that over 500 tonnes was sent in 1176 and 1177.
[A History of Lead Mining in the Pennines, ed.
Raistrick and Jennings, pp. 26-27.]
In
the early thirteenth century, Jordan of Flockton notified the
archbishop of York and the chapter of
St Peter’s that he had granted the monks of Byland access
through his lands from their forge at Bentley to Denby.(69) Following
its negotiations with Swain of Bretton, his son Hugh, and various
other men of the locality, Byland was accorded the right to
take stone for burning at the community’s grange at Bentley,
and to have free entrance and exit for themselves and their
men. (70)