"No, it's the people on the first floor, two gentlemen called Leroux.... They have furnished the apartment below for some relations from the country...."
"A lady and gentleman?"
"Yes."
"Did they come with them last night?"
"They may have.... I was asleep.... I don't think so, though, for here's the key—they didn't ask for it."
With this key, the commissary opened the door on the other side of the passage. The ground floor flat contained only two rooms: they were empty.
"Impossible!" said Shears. "I saw them both here."
The commissary grinned:
"I dare say; but they are not here now."
"Let us go to the first floor. They must be there."