Missing
Sherlock had been missing now for four weeks. Missing might not have been quite the right word; he had disappeared from Mycroft's careful oversight. Mycroft wasn't sure which dismayed him more, that his brother was out of his sight or that his brother had managed to slip through the invisible web of security around him. Should he worry about the myriad sorts of trouble Sherlock would get himself into or be concerned for his physical well-being without someone watching over him? Oh, yes, he was a genius, and geniuses, especially the really intelligent ones like Sherlock, were often very stupid.