Other mistake: Merlin says, "Man will fly someday". For a few frames after he says this, his thumb on his pipe is painted blue, then returns to its normal color. This causes a blinking effect.
The Sword in the Stone (1963)
1 other mistake
Directed by: Wolfgang Reitherman
Starring: Sebastian Cabot, Junius Matthews, Karl Swenson, Rickie Sorensen
Continuity mistake: When Arthur is out hunting in the woods, Arthur is lying on a tree branch. In one shot, his pants leg is coloured brown, whereas, in the next shot, it is skin colour (as if he isn't wearing any pants). In the next shot, the brown pants leg has returned.
Trivia: Except for the prologue, the "Sword in the Stone" does not actually appear until 71 minutes, eight minutes before the film ends.
Question: Why is Arthur voiced by two actors?
Answer: Arthur was voiced by three actors. Rickie Sorenson and Richard and Robert Reitherman. Rickie originally voiced Arthur but, during production of the film, Rickie hit puberty causing his voice to change, so Wolfgang Reitherman chose to use his own sons to replace Rickie.