Holmes 4

The dense fog which so frequently shrouds and dampens the streets of London was particularly intense that morning as Holmes, with his violin, and I with my pipe, sat in our quarters at 221B Baker Street.

"W1," mumbled Holmes, pausing from his incessant repetitions of a Paganini caprice.

"I beg your pardon, my dear fellow?" I asked my companion. "Double me one what?"

"Watson, you hear but you do not listen! I was referring to our postal district, which you know full well must follow any citation ...