December 10: "Space" (from Hades Lord of the Dead)
A/N: Credit for this idea goes to my mom.
One morning, several days before the Christmas of the year 1881, Sherlock Holmes and Doctor Watson sat eating their breakfast. Watson looked through the mail, while his fellow-lodger pored over a newspaper.
"Here's a Christmas card for you, Holmes," said Watson, tossing the envelope down on Holmes's side of the table.
Holmes examined it curiously. He didn't normally receive Christmas cards, and both of them knew it. He glanced up and saw Watson trying to watch him discreetly.
"Whoever is it from? If you don't mind my asking, of course," said Watson, now looking on rather more obviously.
Holmes grabbed a butter knife and deftly ripped the envelope open. The card itself was not of cheap quality, nor was it of extraordinary quality, featuring a small image of a snowman smoking a pipe, and the words "Merry Christmas". He opened the card.
Sherlock,
I am glad, dear brother, to learn that you have moved to Baker Street, as it can only be more habitable than those awful quarters in Montague Street. The newspapers have informed me that you have been involved in several successful cases of late as well. It is gratifying to see that you are now making a habit of utilizing that space between your ears.
Mycroft Holmes
Watson continued to cast him curious glances.
The younger Holmes gave a small snort. "Never mind, Doctor," he said.