BBC!EMPT Sherlock addresses Mycroft as Blud. Meaning brother -
Wiener Blut ('Viennese Blood) is a wedding waltz by Strauss, of 1873. A version of which was played in Sherlock Holmes: Game of Shadows when Dr. John Watson and Madam Simza find her brother at a peace summit held at Switzerland.
Switzerland, The Reichenbach Falls, was the original site where Holmes 'died'.
And finally a waltz composed by Sherlock was played by him for Dr. John & Mrs Watson's first wedding dance.
http://en.wikipedia.org/wiki/Wiener_Blut_%28waltz%29
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