The Ordnance Survey mapped it as a paper mill in 1842, yet by 1902 the same structure appears on revised maps under a completely different identity: Sallybrook Woollen Mill. Somewhere between those two surveys, the business of turning rags into paper gave way to the business of processing wool, and the building quietly absorbed that change without anyone renaming it for posterity.

The structure itself survives. It is a three-storey, eight-bay, gable-ended block, rectangular in plan with its long axis running east to west. The scale suggests a serious industrial concern rather than a modest rural operation; eight bays across three storeys represents a substantial floor area, and the gable-ended form is characteristic of purpose-built mill architecture from the nineteenth century. The mill wheel, which would have drawn power from the Glashaboy, was positioned along the eastern side of the building and remained in place long into the twentieth century before being removed around 1968. Its absence now is one of those quiet losses that rarely gets recorded until someone thinks to ask.