Clegg Hall was a stone built manor, about 2 miles NE of Rochdale, England (see photos below)

The original house was built on this site by Bernulf de Clegg and Quenilda his wife as early as the reign of Stephen. The present comparitively modern erection was built by Theophilus Ashton of Rochdale, about the year 1620. It was in the square, low, dark, mansion. The construction method was called "post and petrel", having huge main timbers, crooks, and filled with a compost of clay and chopped straw.

Legend has it that about the thirteenth or fourteenth century, a wicked uncle came into the house through a tunnel from Stubley Hall (about a mile away) to kill the lawful heirs of Clegg hall and estates. He supposedly killed the children by throwing them over a balcony into the moat. It is reported that their ghosts still reside at the manor.

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The following is an excerpt from an article in the Express Rochdale, 11 June, 1999.
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Clegg Hall at Smithy Bridge is one of 44 buildings in Greater Manchester listed in the second edition of the English Heritage Register of Buildings at Risk, which was published on Tuesday.
The Jacobean mansion on the side of the Rochdale Canal between Belfield and Smithy Bridge is a Grade 2 listed building.
... [bit about the register, concluding:] "The inclusion of a building on the register gives it a high chance of receiving grant aid from English Heritage and other bodies. It will make it easier for owners to seek funding from a range of sources for schemes that will preserve our heritage." All of which is good news for Pennine Heritage, a charity which took over Clegg Hall in 1986, and which is now proposing to establish a national canal library there.
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Thanks to Brian Clegg for the photos.

Map of Clegg Hall area
Thanks to Sheila & Godfrey William Clegg