Conversation so far:
what was the mirror challenge with Harry Houdini?
In 1904, the London Daily Mirror newspaper challenged Harry Houdini to escape from special handcuffs that it claimed had taken Nathaniel Hart, a locksmith from Birmingham, five years to make.
How long did it take houdini to escape from the special handcuffs that it claimed had taken Nathaniel Hart, a locksmith from Birmingham, five years to make in the mirror challenge?
The escape attempt dragged on for over an hour, during which Houdini emerged from his ghost house several times.

Question: did he have an audience?
Self-contained rewrite: did Harry Houdini have an audience for the Mirror challenge?