Complex sentence: When the train arrived at Preston Park station Mapleton was observed getting out of the carriage covered in blood, hatless, without a collar and tie, and very distressed, with a gold watch chain hanging from his shoe.
Split into simpler sentences: When the train arrived at Preston Park station Mapleton was observed getting out of the carriage in a distressed state and covered in blood. He had lost his hat, collar and tie, and had a gold watch-chain hanging from his shoe.