I notice that Bugsworth Hall was close to Derby Knowl and wondered if “Derby Hall” referred to it. The maps site I use, which often links direct to the National Library of Scotland site, is www.oldmapsonline.org, which doesn’t require any subscription: I had a quick look (am intrigued - hope any Derbyshire folk know the answer) and only managed to spot Bugsworth Hall. Good luck! Nickie