For a minute the Arab seemed in despair. Then his face suddenly brightened.
"You suffer from rheumatism, do you not?" he asked.
"Yes, it's pretty bad to-night," she replied.
"Then I will cure it! I will cure your pains forever if you will keep my precious Elixir in secret until I come to reclaim it."
Madame hesitated, for just then she had a very bad twinge indeed.
"You think you can cure my pains?" she asked.
"I know it!" declared the Arab. He put his hand in a pocket and drew out another flask—a mate to the one containing the Great Elixir; only this was made of solid silver instead of gold.
"This flask," said Ali Dubh, "contains a positive cure for rheumatism. It will not fail. It never has failed. Take it and use it to make yourself well. Five drops in a bowl of water are enough. Bathe well the limbs that ache, and all pain will be gone forever. Accept it, gracious Madame, and keep for me the other flask in safe hiding until my enemies have gone away."
Madame was a practical woman, and it seemed an easy thing to do as the Arab desired. If she could get relief from those dreadful pains it would be well worth while to undertake a little trouble and responsibility by caring for Ali Dubh's other and more precious flask.