The two pals went off on foot, made for the Étoile and rang at the door of No 40, Rue Chalgrin, a house with a narrow frontage. Shears found a hiding place in the shadow of a recess formed by the angle of that unfrequented little street.

One of the two windows on the ground floor opened and a man in a bowler hat closed the shutters. The window space above the shutters was lit up.

In ten minutes' time, a gentleman came and rang at the same door; and, immediately afterward, another person. And, at last, a motor-cab drew up and Shears saw two people get out: Arsène Lupin and a lady wrapped in a cloak and a thick veil.

"The blonde lady, I presume," thought Shears, as the cab drove away.

He waited for a moment, went up to the house, climbed on to the window-ledge and, by standing on tip-toe, succeeded in peering into the room through that part of the window which the shutters failed to cover.

Arsène Lupin was leaning against the chimney and talking in an animated fashion. The others stood round and listened attentively. Shears recognized the gentleman in the frock-coat and thought he recognized the head-waiter of the restaurant. As for the blonde lady, she was sitting in a chair, with her back turned toward him.

"They are holding a council," he thought. "This evening's occurrences have alarmed them and they feel a need to discuss things.... Oh, if I could only catch them all at one swoop!"

One of the accomplices moved and Shears leapt down and fell back into the shadow. The gentleman in the frock-coat and the head-waiter left the house. Then the first floor was lit up and some one closed the window-shutters. It was now dark above and below.

"He and she have remained on the ground floor," said Holmlock to himself. "The two accomplices live on the first story."

He waited during a part of the night without stirring from his place, fearing lest Arsène Lupin should go away during his absence. At four o'clock in the morning, seeing two policemen at the end of the street, he went up to them, explained the position and left them to watch the house.