describe the dover mail.

The Dover Mail is a stagecoach that delivers mail and passengers from one place to another. In the second chapter of Book I, the coach's horses are struggling to pull it over a muddy path, and the passengers are walking.

"He walked up hill in the mire by the side of the mail, as the rest of the passengers did; not because they had the least relish for walking exercise, under the circumstances, but because the hill, and the harness, and the mud, and the mail, were all so heavy, that the horses had three times already come to a stop, besides once drawing the coach across the road, with the mutinous intent of taking it back to Blackheath."

Gradesaver's Chapter Summary

Mr. Jarvis Lorry, a confidential clerk at Tellson's Bank of London, is on his way to Dover in a mail-coach. It is a cold night and he is wrapped up to the ears, so his physical appearance is concealed from his fellow-passengers, all of whom are strangers. The coachman fears his passengers just as they fear one another, since highway robberies are exceedingly common and any of them could be in league with robbers. So when he hears a horse galloping towards the coach on the road, he becomes fearful.

Jerry Cruncher, the rider of the horse, asks for Mr. Lorry, giving him a paper message to wait at Dover for a young lady. Mr. Lorry's cryptic reply is, "recalled to life." After this exchange, Mr. Lorry gets back in the coach, which continues to Dover. Jerry pauses and reflects on the long, hard gallop he had from London and muses to himself that he has been given a very strange message.