I wonder how Hamlet feels about this news from England, which he knows is coming. Earlier, he was pretty blasé about the deaths of Rosencrantz and Guildenstern but that was before he was dying himself. Is he sorry he had them killed or sorry he’s going to miss the pleasure of hearing it confirmed?
Also – how long does this trip to and from England take? It would seem not very long. Hamlet just got back from an incomplete journey to England and the ambassadors have already had time to receive the orders to execute Rosencrantz and Guildenstern, to do the executing and get back to Denmark to report it. All without the benefit of airplanes.
Sometimes, I think Shakespeare uses funny geography.