"I gave you two dollars, and you only gave me change for one," cried a thin-faced, stoop-shouldered, helpless-looking fellow, who had just purchased a bottle of the "Balm of the Blessed Islands."

With lightning-like legerdemain the quack had shuffled this bill to the bottom of his pile, and lifting up the one that lay on top, exposed it to the view of his audience.

"That's a lie!" he said, in his slow, impressive manner. "There is always such a man as this in every crowd. Some one is always trying to take advantage of those who, like myself, are living for the public good. Gentlemen, you saw me lay the b-b-bill he gave me down upon the top! Here it is; judge for yourselves. That is a bad man! Beware of him!"

The bold effrontery of the quack silenced the timid customer, who could only blush and look confused. His blushes and confusion condemned him and the crowd hustled him away from the wagon. They believed him guilty and he half believed it of himself.

David, who had seen the bill and knew the victim's innocence but not the doctor's fraud, pressed forward to defend him. The quack stopped and silenced him with an inimitable wink, and then instantly and with consummate art diverted his auditors with a series of droll stories which he always reserved for emergencies like this. They were old and thread-bare, but this was the reason he chose them. He had one for every circumstance and occasion.

There was a man standing in an outer circle of the crowd around whose forehead was a bandage. "Come here, my friend," said the quack. "How did you get this wound? Don't want to tell? Oh! well, that is natural. A horse kicked him, no doubt; never got it in a row! No! No! Couldn't any one hit him! Reminds me of the man who saw a big black-and-blue spot on his boy's forehead. 'My son,' said he, 'I thought I told you not to fight? How did you get this wound?' 'I bit it, father,' replied the boy.

"'Bit it!' exclaimed the old man in astonishment, 'how could you bite yourself upon the forehead?'

"'I climbed onto a chair,' says he.

"And have you been climbing on a chair to bite your forehead, too, my friend?" he asked with humorous gravity, while a loud guffaw went up from the crowd.

"Well," he continued soothingly, "whether you did it or not, just let me rub a little of this b-b-balm upon it, and by to-morrow morning it will be well. There! that's right. One dollar is all it costs. You don't want it? What the d-d-deuce did you let me open the b-b-bottle for? I'll leave it to the crowd if that is fair? There, that is right. Pay for it like a man. It's worth double its price. Thank you. By to-morrow noon you will b-b-be sending me a testimonial to its value. Do you want to hear some of my testimonials, gentlemen?"