Edgar Stroulger

Origin: Harry Potter
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Species: Human
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Residence: Pratchett Street 33 (18-76)
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Talent: Magic
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Import Date: 5(+)

Edgar Stroulger (1703 – 1798) was a wizard who invented the Sneakoscope, a Dark Detector that lit up, spun, and whistled if someone was doing something untrustworthy nearby. For this accomplishment, he was commemorated on a bronze Chocolate Frog Card.[1][2]
A portrait of Stroulger was placed on the sixth floor of Hogwarts Castle, guarding a secret passageway. His password was "Surreptitiousness" in the 1993–1994 school year.[2]