Thinking it over, it occurred to me that way back in my own past, we used to have the milkman, baker and butcher make regular deliveries to our door, and even the greengrocer would do a run twice a week, in a flatbed truck laden with fruit and vegetables.

Around the same time, I can also remember my grandmother protesting against the claimed 'convenience' of the new self-service supermarkets (one of which had just opened in our suburb). She pointed out that, before world war two, everyone did deliveries. If she wanted a spool of cotton, she could just ring the draper and he would deliver it on his evening run. And she could leave her list with the grocer and he would drop off her groceries on his evening run.
By that time(early seventies), there were no drapers as such, and no grocers that did deliveries - but she was right that the supermarkets got rid of all the tradesmen that delivered to your door in no time at all.

So I guess, if the butcher had a daily round of deliveries, it would not be going out of his way to take Mr Elton's trunk along to "the place where the coaches pass", and would save a servant having to lug it in a barrow or carry it, or laden a pack horse with it.