The wizarding world has many inherent prejudices, the most notable of which is pureblood prejudice against muggleborns and squibs. On a superficial level these view appear only to be a product of the nasty personalities of people like the Malfoys.
However this prejudice runs deep within wizarding society, so deep that pureblood families would rather breed themselves in complete degeneracy than broaden their gene pool with non-purebloods. Whilst we can write this off as pure pig-headed dedication to ideology. I believe that there is a much deeper, rational reason behind pureblood prejuidice.
The recognition of William Gillette as Sherlock Holmes was growing as a result of the success of the play Sherlock Holmes . Playing upon his most famous role, a short comedy sketch performed by William Gillette as a curtain raiser to an unrelated play. It involves a mute Sherlock Holmes, and a very talkative client. In Haining and Tracy’s books, they speculate as to whether or not this play was written by Arthur Conan Doyle. Certainly Gillette would have needed Doyle’s consent to write an original work involving Sherlock Holmes, as the character was under copyright, but it is presumed by most Sherlockians that Gillette wrote the whole thing himself. Haining, however claims that Gillette may have asked Doyle to ‘whip up something quickly for him’. However, no manuscript exists in Doyle’s hand, and no reference of the play is left by him, it has been assumed by most that it is little more than a William Gillette curiosity.