In the 1950s a firm called Linden Engineering Company of Bradford had some drawings produced for a 5 ins. gauge Ivatt Atlantic No. 2750 as rebuilt with Walschaerts valve gear. I believe that the firm is now long gone but is there anyone out there who has a set of these drawings I could borrow or copy. I would buy a set if they still available but that does not seem to be the case. I have the Clarkson Atlantic drawings but they don't include the Walschaerts variant.