"The secret staircase!" The Doctor was determined to take no risk.

"I will forget the secret staircase!" said the sleeper.

"You will forget this room?"

"I will forget this room!"

"Finally, you will forget that you have been asleep?"

"Finally, I will forget that I have been asleep!"

"Good! That ought to be safe enough!" This the Doctor said to himself, but the sleeper replied:

"Good! That ought to be safe enough!"

"Pah! He is a mere automaton," said the Doctor.

"A mere automaton!" repeated Barnes.