Herr Zeiss—I heard this name at the Central Office—appeared to me to be a simple-minded man, more likely to be the victim of a conspiracy than himself a conspirator. I thought it my best plan to assume an air of omniscience at the outset.

‘How is this, sir!’ I demanded with some sternness. ‘Do your instructions permit you to leave this instrument unguarded for any person who pleases to send his own messages over the Emperor’s private wire?’

The telegraphist stared at me with a mixture of surprise and alarm.

‘I don’t know who has authorised you, Herr Inspector——’ he began, when I cut him short.

‘Am I to go to his Majesty, and ask him if you have permission to leave this room when you please, without taking any precautions against the unauthorised use of the wire?’

Herr Zeiss quickly changed his tone.

‘That is not a thing of which I am ever guilty,’ he protested.

‘You have been guilty of it just now,’ I retorted.

‘I have not been away two minutes. No one could have taken advantage of my absence.’

‘Nevertheless, advantage has been taken of your absence.’