They seem to have bodged up doorways in the sides, several of them. I do wonder about the weight situation, though, a carriage full of turf must be way over a carriage full of people and a few bits of luggage.
Nip into Easons and have look at the real picture - the book is on the stand in the middle of the floor at the far end.
The picture shows the first three carriages, and the fifth, to be of one type and the fourth is a similar, but different type.
The book also contains some other railway pictures, including one of a fatal mail train derailment - I showed the book to 'my agent' over there - and it turned out that his wife had lived across the road from the unfortunate victim of the crash - small world.