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.
The solicitor says that the money has been returned, but the bank notes are seen blowing in the wind.
Joseph Finsbury boasts that he is one of only two Englishmen who can speak 'pure Swahili.' Swahili was the primary language of East Africa, which was colonized by Britain at the time. Tens of thousands of Brits lived among Swahili-speaking people, had Swahili-speaking servants, preached, doctored and traded with Swahili-speaking peoples, and British scholars studies the Swahili language. Lots of Englishmen were Swahili speakers.
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.
In the aftermath of the train wreck scene, the background sounds (i.e., muttering and exclamatory crowd noises) are "looped" mercilessly, the same few seconds of "babble" are repeated at least ten or fifteen times in a few minutes.
The Victorian-age London houses have TV antennae on them.
Joseph Finsbury's nephews keep taking away his tobacco, presumably to extend his longevity. In the time period of this film, it was not known that smoking is harmful.