When Jamie is riding towards Isobel who is pushing the pram with the baby he is riding on the right and leading a horse in the middle while another groomsman is riding on the left. In the next scene he is on a horse in the middle and you a totally different groomsman on the right. He also dismounts from the horse on the right.
At 58:08 -The actual Bob Dylan lyric is: "I saw ten thousand talkers whose tongues were all broken" but the audio is: " I saw ten thousand takers whose tongues were all broken".
Roger starts the car by leaning in and turning the key. This was long before the day of electronic ignition. A car would rarely, if ever start with a simple turn of the key. One would need to use a choke or pump the gas pedal before starting.
Lord Dunsany was a baron, so his daughters would have been addressed as "Miss Geneva" and "Miss Isobel" not "Lady Geneva" or "Lady Isobel." Only the daughters of earls, marquesses, and dukes may be use the title "Lady" before their first name.