Halton Castle at Halton, has a pele tower -- square defensive structure, often found in this once famously anarchic part of the country. Oddly, pele towers are not totally unknown in the Midlands: there is one at Canons Ashby House, Canons Ashby, Northamptonshire (near Woodford Halse). The C.A. House pele tower owes its existence, it seems, to a Cumbrian sheep farmer called John Dryden having, long ago, moved to Northants. -- maybe he felt homesick...