Jadding was the term used for cutting stone with a ‘Jadding Iron’ which was essentially a long iron bar with a chisel end. Early quarries were all cut in this way before the advent of saws in about 1840. The faces on the pillars cut using Jadding Irons leaves a distinctive hatching pattern as below.

Later, Jadding was only used to take out the back corners of the breach which could not be reached by the curving swing of the pick. A good picker would not need to use one as he would be able to swing both to right and left.