The mansion shown in the street view at 00:53:10 with first the pedestrian walking away, then a Ford Model T roadster moving from right to left before it is passed in the opposite direction by a cable car was built by sugar magnate Adolph Spreckels at 2080 Washington Street, San Francisco, in 1912 as a gift to his daughter Alma and is now the home of novelist Danielle Steel.
The device used from 00:12:26 to 00:12:45 by the smugglers to communicate between ship and shore using handwritten messages transmitted electronically is known as a telautograph, patented in 1888 by American inventor Elisha Gray.
For Colleen, Dinty gave her a role that was larger than any of the previous work. Film critics singled her out in this film and her popularity with fans grew as a result.
A Burton Holmes travelogue and a short documentary called 'Feathered Fighters of the Farrolones' played ahead of this film during some of its initial screenings.