Christmas morning!
Watson remembers the thrill that would send through him as a child. Have you been good, and will Father Christmas leave you something?
Well. He hasn't been good. But Mrs. Hudson is calling out, from the sitting room, in a voice almost rendered childlike by her excitement, "Doctor Watson! Wake up! It snowed, Doctor!"
Watson smiles. Holmes must be sputtering at the landlady's improper, although well intended, presence in the parlor.
"Do wake up," says Holmes, appearing in his doorway, looking disheveled but cheerful in his rumpled dressing gown. "Our estimable landlady is right. It has been snowing."