Question

What did Sherlock discover about the owner of the hat? How did he arrive at his conclusion in 'The chapter the adventure of Blue Carbuncle '.
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Answer 1

Explanation:

When Sherlock learnt that the goose had the blue carbuncle in it, he realised the fact the man with the hat also had the goose. ... The roughs also ran away and the tall man lost both his goose and his hat. There was a small card tied to the bird's left leg with, 'For Mrs Henry Baker,' written on it.