Holmes couldn't help a dry smile at the mention of the engagement ring- and at the realization that it didn't seem Mary was going to be privy to their next little adventure. "Are you? Certain, that is. Perhaps this is your subconscious attempting to reason with you." A beat, "What that says for my subconscious is still questionable, but then I should get my head together a bit, before worrying after myself."
Now that the device had stopped its infernal chirping, Holmes' attention was turned back to it, running his fingers along the seams as if searching for a way to pry it open. "On top of which, I'm rather certain this device is a bit beyond my imaginings. And it feels like nothing I have ever known... can a delusion change physical matter?"