 Not wanting to insult Donald by explaining why the machine was not working correctly, Brown offered to try and source another machine from somewhere.Brown phoned Alex Rankin, the man who collaborated with Brown on the automatic flaw detector for help Rankin offered to gift the latest Mk IV Flaw Detector which was subsequently forwarded to Glasgow Central station from the Barkingside Labs location of Kelvin & Hughes, for delivery to Brown.Brown approached deputy chairman Bill Slater who sent Brown to see Bill Halliday, the company's chief research scientist for an opinion on building the machine.