Equipped with a device, manometer type, the unknown seems to take readings at the level of the taps in the kitchen and the bathroom. He then warns the old lady that he will have to use mercury in the pipes. To protect them and prevent their discoloration, he asks her to put her gold jewelry and silver away in a bag … under the bedspread in the bedroom.
Then, the checks completed, the man takes leave after having taken care to tell the lady not to reopen the room “for several hours”.
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