"You saw him, I suppose?"
"Yes, I was turning off the gas on the stairs. He has bolted his door."
"Is there no one with him?"
"No one: he doesn't keep a servant ... he never has his meals here."
"Is there no back staircase?"
"No."
Ganimard said to Shears:
"The best thing will be for me to place myself outside Lupin's door, while you go to the Rue Demours and fetch the commissary of police. I'll give you a line for him."
Shears objected:
"Suppose he escapes meanwhile?"