He is going to summon, before the magistrate, in the laboratory, all those who have played any part in this tragedy.

It will be very interesting.

It is a pity you won't be able to be present." "I shall be present," said Rouletabille confidently.
"Really--you are an extraordinary fellow--for your age!" replied the detective in a tone not wholly free from irony.

"You'd make a wonderful detective--if you had a little more method--if you didn't follow your instincts and that bump on your forehead.

As I have already several times observed, Monsieur Rouletabille, you reason too much; you do not allow yourself to be guided by what you have seen.