She was very clever.  She still had self-control when it was necessary to have it in the furtherance of the one devouring passion.  Only when she was quite alone did she ever give way.  The doctor thought her wonderfully docile and took heart of hope.  A month or two alone with her in Prance and all would be well.  In the meantime, patience!  Naturally she was full of childish whims.  He smiled at her indulgently when she asked him to request Miss Philps to stay outside of the fitting room at Miss Milligan’s.  “For you know,” she said, “it is bad luck, very bad luck, for any person to see one, in one’s wedding gown before the proper time.  And anyway,” the grey eyes filled with easy tears, “I’m sure it isn’t good for me never to be trusted, not even with silly Miss Milligan.”

The plea seemed genuine.  It was like Mary to be concerned about the wedding-dress superstition.  And what possible danger could there be?  Miss Milligan in all probability had never heard the fatal names of opium and cocaine save as unpleasant things associated with Chinese and tooth-drawing.  It was absurd to imagine Mary coming to harm there.

From this you will see that, upon the occasion of the last discovery, Mary had lied desperately and well.  The “cache” in the bird-house had been found, but Miss Milligan’s name had never been connected in the most remote way with that relapse.  Mary had sworn that the new supply had not been new at all but had formed part of an old cache which she had hidden, in a place which even she had forgotten, all quite accidentally.  And although many supplementary enquiries were made, the real truth had remained undiscovered.

So in the simplest way in the world, Mary secured several uninterrupted “fittings” with Miss Milligan while the excellent Miss Philps sat without and waited.

“This is positively the last time I shall have to trouble you, dear Miss Milligan,” said her customer sweetly.  “Of course, as soon as we are married, I am going to tell Dr. Callandar all about it and when he sees how very much better my medicine has made me, he will be quite ready to withdraw his objections.  In the meantime I am sure you feel, as I do, that our little ruse has been quite justifiable!”

Miss Milligan did.  She felt quite proud of her part in it.  It is something to help a fellow woman and still more to get the better of a fellow man.  Especially such a celebrated man as Dr. Callandar!  She would order the fresh supply at once, that very afternoon, by the first mail.  And as soon as the packet came she would see that Mrs. Coombe had it in person.  “There is certain to be a few last touches necessary to the dress after it has been sent home,” she remarked with a smile of truly Machiavellian subtlety.

“Yes!” said Mary.  “That night—­after the dress comes home!” She spoke sharply, unnaturally.  Her face turned a dull, pasty white.  She shook so that Miss Milligan was thoroughly frightened.  But presently she controlled herself and forced a pathetic smile.