"So Christmas does not concern you?" Watson asks, taking a coal in the tongs to light his pipe.
"No," Holmes says, "It is a phenomenon of family. I am not a familial creature."
Downstairs, Mrs. Hudson is humming and getting the goose ready for Christmas dinner. She hears their talk and laughs.
The doctor considers how extremely foolish such an intelligent man as Holmes can be. Perhaps he does tend more towards being Scrooge then Tiny Tim, but then, the doctor would have him no other way.
"And so," the landlady murmurs wryly to herself, "God bless us, every one!"