For more information on the Barnum & Baileys Circus Trains also Buffalo Bill trains for the British and European tours see Back Track magazine January and February 2014.
Articles by Mike G Fell give an in depth description of the organisation involved in moving the shows around. The shows went on in a differant town each night from the beginning of April until the end of October. It took 3 trains each night to move the animals and entertainers between towns Very impressive, I do not think anything on this scale could be achieved today.