Okay, tried to cut and paste but it wouldn't allow me to, but it's only a brief para anyway so here it is.

Techniques

Large chimneys and stacks were easily climbed. They were often built with stepped sides, iron rungs, metal pegs or protruding bricks, inserted into the flue to aid the sweeper. Evidence of this could be seen until recently at the Buck's Head, Little Wymondley (Herts). This small 17th-century inn has a central chimney stack with four flues. two Inglenook fireplaces on the ground floor contain iron rungs set at intervals up the interior of the chimney. Basement chimneys in Knightsbridge were fitted with ladders.