Spike took a moment to look back at his caretaker, before sliding the royal letter into the post box out on the balcony of the castle, awaiting to be picked up by the afternoon mailpony. Who would see the royal wax seal of Twilight's cutie mark, and expedite it to another pegasus, or griffin who could deliver it over far longer distances. Until it finally reached its destination, The Royal Sonata Hotel in Baltimare where Rainbow would be staying, and awaiting further instructions.