Calvin hardly needed to be an empath to see the exhaustion present in his co-conspirator's body as he dragged himself toward the office. Calvin certainly didn't blame him, after the night he must have had. The Danu deeply sympathized, and resolved to keep the meeting short, if possible. For both of their sakes, since they clearly both needed rest.
At Allwyn's immediate gesturing, Calvin's eyebrows lifted, his jaw dropping when he stepped to the side to see, sure enough, the teacup precisely where his guest said it was. "So it is!" he exclaimed, passing the cup to him. "But goodness, how ever did you know? I couldn't possibly have seen it straight off from that angle, much less from across the room."