But there was one workaround that Dumbledore overlooked. At the Ministry Atrium, Arthur Floo-called Sirius, who spoke permission for Madam Bones to enter Grimmauld Place. After Arthur and Harry stepped through the Floo into Grimmauld Place, Arthur quickly stepped back through the Floo into the Atrium, put his hand on Madam Bones’s shoulder, then the two of them stepped through the Floo fire again. Voilà—now Madam Bones was in Grimmauld Place without knowing the Secret.