A shadow blocked the light outside the door. The visitor took off his hat, handed his coat to the attendant outside to hang on the coat rack, and lit his pipe, blowing out a stream of gray-white smoke slowly.
"Louis, it's only been a few days since we last met, why do you look so haggard?"
Louis raised his hand, signaling for him to close the door. Although Arthur did not refuse, he couldn't help joking after closing the door, "You worked at Scotland Yard, so you should know that for those who really want to eavesdrop, closing the door doesn't work."
Perhaps because of the presence of another person, Louis felt that the atmosphere in the room had become much more relaxed.
He breathed a long sigh of relief, and a smile appeared on his lips: "I believe the Great Paris Police Hall hasn't yet introduced such advanced technology."
"Even without advanced technology, some relatively primitive methods can achieve the same effect."
