All The Year Round
This is as close as we get to a mention of correspondence in All The Year Round. It’s a note from the editors of the journal to it’s expectant readers signifying what will be contained in the following week's serial. Essentially it is a note from one party to another to expect future correspondence. Although it does not indicate the rising popularity of the written word in the form of letters, it instead becomes more a one-sided promise from a producer to a consumer that there will be more publications to come.