The protagonist expresses excitement and curiosity upon receiving a rare gift from Holmes, who is not known for giving presents. This unusual gesture piques the character's interest, particularly because it reflects Holmes's rarely seen romantic side.
Inside the dark velvet box, the character discovers a new set of picklocks, reminiscent of Holmes's own, which adds a personal touch to the gift. The mention of Mrs. Hudson suggests that this thoughtful gift will bring her joy as well, highlighting the significance of this moment in their dynamic.