. "Horbury" . . . . "Yorkshire Railway Wagon Company" . "Horbury railway works" . . "Horbury railway works" . . "Horbury_railway_works#Yorkshire_Railway_Wagon_Co." . "Charles Roberts" . . . "Charles Roberts and Co. Ltd." . "Charles Roberts & Company" . "Wakefield" . . "Procor Engineering Ltd.)" . "Procor Engineering" . . "Charles Roberts & Co." . "Chas Roberts" . "Roberts" .