The script held in the Crawford Collection in the AFI Research Collection contains the following character notes (excluding regular characters):
'WENDY MASON: A nice young kid of ten or eleven who is in the middle of a love affair with an old bay horse - "GEORGE".
'ALFONSO, THE GREAT: A ventriloquist, one of the old timers who refused to die with vaudeville when television slaughtered it all those years ago. The airs and style of "THE GRAND OLD DAYS" he once used as a front have now become real and are a genuine part of his character. However, it cuts no ice with his cheeky, young dummy, Willie.
'CHARLIE HUNT: The Knackery Manager. A curt man made coarse and almost callous by his calling. (TRUCK DRIVING REQUIRED).
'JOHN and TOM: Two young boys about twelve. John is more of a leader than his mate.
'2 HORSES: Both old, but "GEORGE" is a year or two older than "HANNIBAL".'