At the elf's instruction, Miles took a moment to summon his own Patronus. It took the form of a fox and walked just to Miles' side, as directed. Miles was calm, taking in his surroundings- though the dark and gloom was much as he had expected, for this sort of meeting.
Miles sat at the table, requesting a glass of wine from the house elf, and looked calmly back to Rodolphus as his own patronus settled at his side. "Good evening, and well met, certainly."