The so called Admirals Bath Chamber under Wollaton Hall hill [near Nottingham] may be see on :-

http://www.aditnow.co.uk/documents/Personal-Album-176/Making-Water---Younger-2004.pdf 

It might however have originated as an Elizabethan treadmill chamber for hauling service waggons descretely up a railed tunnel to the 1558 Hall.
[Does anybody have any info. on that ?].

However it was re-used as a bath chamber in the 1700's and what fascinates me is the half elliptical Tee extension at its rear. This has the remains what could have been a brick dam at its mouth - and is approx. twice the surface area of the 'bath' itself. My suspicion is that it was used as a reservoir to periodically flush the bath out.

The bunterstone it is excavated in has the characteristic that if touched water begins to flow out of it.

My question is does anybody know of deliberate attempts to de-water bunterstone by intimately lining half elliptical excavations with leather or cloth to induce the sandstone to weep ?

There may be some evidence to suggest that similar might have been tried elsewhere in Wollaton to augment an inadequate water supply to a coalmill pump.

Waggonwayman.