On the map of Manhattan that George is doodling on, what is now Roosevelt Island (in the East River) is labeled Welfare Island. It was named that from 1921 to 1973, for the several hospitals there. It was renamed Roosevelt Island in 1973, in honor of FDR.
Blackton Gregory (Reginald Owen, born in England) pronounces Berkshires (the mountains north of Manhattan) as "Barkshires". That is consistent with several similar British pronunciations, e.g., Berkeley Square ("Barkeley") and clerk ("clark").
Many cast members in studio records/casting call lists did not appear or were not identifiable in the movie. These were (with their character names, if any): Leyland Hodgson (Henchman), Beatrice Blinn (Telephone Operator), Lew Hicks (Policeman), Harry Bernard & Robert Dudley (Program Men), Helen Dickson (Dowager), Georgie Cooper, Larry Steers and Charles C. Wilson.