Oneword: Sacred

Though he had no idea what might be happening, or what to do about the dead end they'd just run into, John knew better than to ask Sherlock for clarification. The moody detective had retreated to his mind palace, eyes closed in instense focus. John supposed that if he were constantly irritated by the world around him, as Sherlock was, it would not bode well for any soul who dared disturb his sacred solace.

John only hoped the mental escape would not take too much longer; he missed being let in on his friend's amazing thought process.