Merry Christmas! (Day 3)

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Sherlock Holmes solves a minor mystery on the third day of Christmas in The Adventure of the Blue Carbuncle. Geese and the eating thereof figure prominently in the story. Excerpts:

Watson finds Holmes contemplating a battered felt hat, which a neighbor found in the streets together with a goose, and brought to Holmes thinking he might find the rightful owner.
It arrived upon Christmas morning, in company with a good fat goose, which is, I have no doubt, roasting at this moment in front of Peterson's fire. The facts are these: about four o'clock on Christmas morning, Peterson, who, as you know, is a very honest fellow, was returning from some small jollification and was making his way homeward down Tottenham Court Road. In front of him he saw, in the gaslight, a tallish man, walking with a slight stagger, and carrying a white goose slung over his shoulder. As he reached the corner of Goodge Street, a row broke out between this stranger and a little knot of roughs. One of the latter knocked off the man's hat, on which he raised his stick to defend himself and, swinging it over his head, smashed the shop window behind him. Peterson had rushed forward to protect the stranger from his assailants; but the man, shocked at having broken the window, and seeing an official-looking person in uniform rushing towards him, dropped his goose, took to his heels, and vanished amid the labyrinth of small streets which lie at the back of Tottenham Court Road. The roughs had also fled at the appearance of Peterson, so that he was left in possession of the field of battle, and also of the spoils of victory in the shape of this battered hat and a most unimpeachable Christmas goose."
There's a jewel that's been force-fed a certain goose (a rich foie gras indeed), but as it turns out the thief has foiled himself and gains nothing from his crime but ruin, Holmes takes pity in light of the season and turns to his own Christmas feast (spoiler):
I suppose that I am commuting a felony, but it is just possible that I am saving a soul. This fellow will not go wrong again; he is too terribly frightened. Send him to jail now, and you make him a jail-bird for life. Besides, it is the season of forgiveness. Chance has put in our way a most singular and whimsical problem, and its solution is its own reward. If you will have the goodness to touch the bell, Doctor, we will begin another investigation, in which, also a bird will be the chief feature."