Coal has been worked in Middleton since the 13th century, from bell pits, gin pits and later "day level" or adits. Anne Leigh, heiress to the Middleton Estates, married Ralph Brandling from Felling near Gateshead on the River Tyne. They lived in Gosforth and left running of the Middleton pits to agents. Charles Brandling was their successor. In 1754, Richard Humble, from Tyneside, was his agent. Brandling was in competition with the Fentons in Rothwell who were able to transport coal into Leeds by river, putting the Middleton pits at considerable disadvantage. Humble's solution was to build waggonways which were common in his native north east. The first waggonway in 1755 crossed Brandling land and that of friendly neighbours to riverside staithes at Thwaite Gate.