Continuity mistake: When the movie ends, Mr. And Mrs. Darling, Wendy and Nana are by the window looking at the sky. In the aerial angle they all disappear.
Continuity mistake: When Mr. Darling is getting dressed, a jar of water suddenly appears no the night table behind him.
Answer: In the original stage play by J.M. Barrie, he was a bank clerk. I don't think what he did for work was brought up in the 1953 film.
Bishop73