What musical instrument can Sherlock Holms play?

pers. On a chair, there was a very dirty old hat and a magnifying glass.
I suppose,” I said:”that there is a story about that hat which will help so another mysterious crime.”
“There is no crime,” said Sherlock Holmes laughing.”Just a strange little incident. Peterson, the door attendant, found the hat. At about 4 o’clock in the morning, he was coming back from a party when he saw a tall carrying a goose. Suddenly, two thugs appeared. One pushed the man and the other thug tried to take the goose. Peterson went to protect the man, but saying some in uniform he dropped the goose and ran away. All the attacker disappeared so Peterson was left with both the goose and old hat. There was a card with the goose saying ”For the Mrs Henry Baker” and the initials ”H.B” inside the hat but there are a lot Henry Baker in London. Peter did not know what to do with either the hat all the goose so he brought both to me on Christmas morning. I kept the hat and Peterson had the goose for his Christmas dinner.”
“So can you find any clues about the man from this old hat?”
“What can you see,Watson?”
“Well,it is an ordinary black hat.The lining is made of red silk and there is no elastic.There is some dust on it and several spots.Someone has tried to cover all of the spots with ink,But I can not see any clues.”
“Well,Watson,the hat tells us a lot about the hat’s owner.He used to be quite rich but something must have happened to him,probably with drink.His wife no longer loves him.He is middle-aged with grey hair-which he has had cut recently.He does not do much exercise and he has not got gas in his house. ”
“You must be joking Holmes.How do you know all that information?”
“Elementary,my dear Watson.”
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After that,Holmes explained all the clues about the hat to Watson. Then Peterson came into the room carrying an enormous diamond which his wife had found inside the goose.Holmes realized that this was the famous diamond stolen from a countess when she was staying at a London hotel .Two hotel servants had been involved.One was the butler,James Horner,a plumber.Horner had been working in the countess’room when Ryder noticed that the diamond had been stolen.Since then,Horner had been in prison for several days.Sherlock Holmes decided to asvertise for the goose and hat in the newspapers,That evening a man appeared;it was Baker.Baker did not know anything about the goose.They went there and saw a man,who turned out to be Ryder,the hotel butler,asking about the goose.Holmes invited him back to his house and when Holmes mentioned the diamond Ryder confessed that he had stolen it.After Horner’s arrest,Ryder had gone to his sister’s house to hide the diamond.There had been some geese in the garden and Ryder had put the diamond into its mouth and then asked his sister for this goose for Christmas.Later,he had taken the goose away and killed it there was no diamond as he had chosen the wrong goose!Holmes had enough proof to put Ryder into prison,but he decided to let the man go.In the end,Horner was released from the prison and the diamond returned to the countess.