Before the grate, with his mouth half open, and his right arm extended in an interrupted gesture, the doctor stood speechless and disconcerted. It was only when the outer door closed with a bang that he seemed restored to consciousness. And as he heard the noise he sprang forward as if to recall his visitor. “Ah!” he exclaimed, with an oath, “the miserable old woman was mocking me!” And urged on by a wild, irrational impulse, he caught up his hat and darted out in pursuit. Madame Leon was considerably in advance of him, and was walking very quickly; still, by quickening his pace, he might have overtaken her. However, he did not join her, for he scarcely knew what excuse to offer for such a strange proceeding; he contented himself by cautiously following her at a little distance. Suddenly she stopped short. It was in front of a tobacconist’s shop, where there was a post-office letter-box. The shop was closed, but the box was there with its little slit for letters to be dropped into it. Madame Leon evidently hesitated. She paused, as one always does before venturing upon a decisive act, from which there will be no return, whatever may be the consequences. An observer never remains twenty minutes before a letter-box without witnessing this pantomime so expressive of irresolution. At last, however, she shrugged her shoulders with a gesture which eloquently expressed the result of her deliberations; and drawing a letter from her bosom, she dropped it into the box, and then hastened on more quickly than before. “There is not the slightest doubt,” thought the doctor, “that letter had been prepared in advance, and whether it should be sent or not depended on the answer I gave.” We have already said that M. Jodon was not a wealthy man, and yet he would willingly have given a hundred-franc note to have known the contents of this letter, or even the name of the person to whom it was addressed. But his chase was almost ended. Madame Leon had reached the Hotel de Chalusse, and now went in. Should he follow her? His curiosity was torturing him to such a degree that he had an idea of doing so; and it required an heroic effort of will to resist the temptation successfully. But a gleam of common sense warned him that this would be a terrible blunder. Once already during the evening his conduct had attracted attention; and he began to realize that there was a better way of winning confidence than by intruding almost forcibly into other people’s affairs. Accordingly he thoughtfully retraced his steps, feeling intensely disgusted with himself. “What a fool I am!” he grumbled. “If I had kept the old woman in suspense, instead of blurting out the truth, I might have learned the real object of her visit; for she had an object. But what was it?”