For some reason the early North winder sat well back in the engine-house, with the cylinders partly in the South and the drum only just inside the North. The overcast rope exited through a raised structure part way along the ridge of the engine-house roof.

In 1904-5 this winder was replaced and the new one was positioned in front of it with the drum close to the end wall. In order to accommodate to accommodate both underlap and overlap ropes, the end wall was again reconstructed, with  the curved coping stone at the ridge now being replaced by two inclined slabs.

New flat coping stones on the North engine-house end wall (FoPP/JST)

The ridge tiles and the slates also look to be new in comparison with those on the South engine-house roof .

On the east side wall is an old steam pipe entry with a rim formed from curved stone segments. This was discontinued at some time and filled in with bricks.

About 3ft / 1m above the pipe-entry is a series of angle-irons embedded in the wall.  These appear to have been inserted when the wall was built and could have formed a support for the roof which is shown covering the boiler-houses in the 1885 etching.

Corbel stone in the North engine-house East wall

Remains of original angle-iron in the North engine-house East wall

At a similar height in the west wall is a series of corbel stones built into the wall. These could have formed a support for a roof similar to that on the east side or they could have been added later to support a gantry linking the two pit-tops when the South pit was upgraded to coal winding.