From Wordwielder:
13) God Rest Ye Merry Gentleman
Watson found himself waking up to a rather excellent rendition of God Rest Ye Merry Gentleman that was being sung in a deep, rich baritone much to his surprise. Part of this surprise was due to the fact that he knew for certain that that was not the voice of his flatmate Sherlock Holmes coming from the sitting room.
The voice didn't appear to belong to Gregson, Lestrade, or any other male acquaintance of his or Holmes, including some of the older Irregulars. Worried that someone had broken into the flat for nefarious purposes and half-afraid of what he would find, he didn't take the time to dress and instead threw a dressing gown on over his pyjamas, only barely pausing to tuck his revolver into his pocket on his way to the sitting room.
Moments later, he found himself standing and staring in shock in the doorway of the sitting room as Mycroft Holmes decorated a small tree which had been set atop Holmes' desk which had been swept clear of the random array of detritus that had accrued upon its surface. Everything which had been on the desk had been swept to the floor in order to provide room for said tree which Mycroft was decorating with a long string of brightly colored glass beads.
"Happy Christmas Doctor Watson!" the elder Holmes said without turning around or even pausing in his task.
Realizing that it would probably be rude to ask his flatmate's older brother what he was doing here, especially on Christmas morning when family tended to gather, he instead turned his inquiry towards the unusual ornamentation with which the elder Holmes was adorning the tree.
"Sherlock made it when he was seven." Mycroft said almost proudly as he wound the last of the string's length around the lowest branches of the diminutive tree. "He was always making such things when he was younger, proving that he had inherited the artistic streak that rand through Grand-mere Vernet's family."
Watson had to admit that the string of beads that was wrapped around the tree was quite beautiful. The colors all complimented each-other perfectly.