This fortuitous convergence of all three classes of multiple-unit cars at Humber Loop shows from left to right: 1947 A-7 class 4404 waiting for its operator to return from a trip to the "convenience"; "Louisville" 4693 lays over on the through track during what appears to be a fan charter on October 25th, 1981; and 4673 (ex-Cleveland Transit System 4223) swings 'round the loop on its way back across Queen to Neville Loop.