Herald Tantras is there already, and seems weirdly delighted to see him. "Abras! Sorry about the early start, but I'm really delighted they've assigned you as well, it'll be so much less boring. Tea?" He has a pot steeping on the table. "Here, let me show you the relay book..."
It has a page with today's date on it and a number of short messages, in various different people's handwriting, each titled with a point of origin and a destination. Most are, in fact, pretty boring. Herald A on one circuit wants Herald B a few circuits over to know about an unusually high rate of Pelagirs incursions along the northwest border. Soap is in short supply in the southeast because the landholding that makes and sells most of the soap had half of their livestock die of pox, pass it on to any merchants who want to make a killing. There are also announcements originating from Haven that need to be sent down every leg of the relay.
Next to the book, Tran has a map that shows the relay stations and the names of the Heralds assigned to them. He seems to consider both the book and the map to be self-evident, and doesn't offer any explanation unless Abras asks.