Geograph - photograph every grid square

A 'Heddon' brick and 'Stephenson' brick are incorporated in the modern pillar supporting an information board about the Isabella Coke Ovens NZ1565 : Remains of Throckley Isabella Colliery Coke Ovens

Around 1840, a farmer called William Stephenson leased the upper coal seams of Bobby Pit at Throckley, mining clay and coal to make tiles and drainpipes and, in 1850, fireclay goods. In 1867, his two sons, William Haswell and Charles John combined with John Spencer's three sons to open the Isabella Pit for deep coal mining in 1867. They overcame difficulties of drainage and formed the Throckley Coal Company in 1891. They acquired Margaret pit at Heddon in 1902 and in 1906, merged with Wm. Stephenson & Sons, brickmakers, and sank a third mine at Throckley, the Maria pit.