Welcome Mcdonar1.You obviously have access to the refereeing bible, Upton's or similar. At the time Mr Mitchell was around, I was a southern softie and so know nothing more about him than you do, and I certainly did not see him in action at Selhurst Park before he retired. I am sure others will be of more help - perhaps our Bradford PA fan - and I hope you get some helpful information about this long-standing referee on the Football League. Is there a family connection here by any chance? Good luck!