The film was made and released about seventy-seven years after its source novel of the same name by Lloyd Osbourne and Robert Louis Stevenson had been first published in 1889.
Just before the train crash you can see the smoke and steam going back into the engines, signifying the trains were in reverse and the film played backwards.
Opening the door to leave his brother's house after nearly being hit with a thrown vase, the Ralph Richardson character has two flowers in his left hand; there's then a cut to an exterior shot showing him emerging from the house flowerless.