"Madam," said he, with a deep pathos in his voice, "no one can be better aware than I am that I have made many mistakes in the course of my life; but that quality on which I think I have reason to be satisfied with myself is my rigidity when I know a thing is wrong. There occurs to me now an instance in my career which will prove to you what I say. "I knew a man by the name of Spotkirk, who had invented a liniment for the cure of boils. He made a great success with his liniment, which he called Boilene, and at the time I speak of he was a very rich man. "One day Spotkirk came to me and told me he wanted me to do a piece of business for him, for which he would pay me twenty-five dollars. I was glad to hear this, for I was greatly in need of money, and I asked him what it was he wanted me to do. "'You know Timothy Barker,' said he. 'Well, Timothy and I have had a misunderstanding, and I want you to be a referee or umpire between us, to set things straight.' "'Very good,' said I, 'and what is the point of difference?' "'I'll put the whole thing before you.' said he, 'for of course you must understand it or you can't talk properly to Timothy. Now, you see, in the manufacture of my Boilene I need a great quantity of good yellow gravel, and Timothy Barker has got a gravel pit of that kind. Two years ago I agreed with Timothy that he should furnish me with all the gravel I should want for one-eighth of one per cent. of the profits on the Boilene. We didn't sign no papers, for which I am sorry, but that was the agreement; and now Timothy says that one-eighth of one per cent. isn't enough. He has gone wild about it, and actually wants ten per cent., and threatens to sue me if I don't give it to him.' "'Are you obliged to have gravel? Wouldn't something else do for your purpose?' "'There's nothing as cheap,' said Spotkirk. 'You see I have to have lots and lots of it. Every day I fill a great tank with the gravel and let water onto it. This soaks through the gravel, and comes out a little pipe in the bottom of the tank of a beautiful yellow color; sometimes it is too dark, and then I have to thin it with more water.' "'Then you bottle it,' I said. "'Yes,' said Spotkirk; 'then there is all the expense and labour of bottling it.' "'Then you put nothing more into it,' said I. "'What more goes into it before it's corked,' said Spotkirk, 'is my business. That's my secret, and nobody's been able to find it out. People have had Boilene analyzed by chemists, but they can't find out the hidden secret of its virtue. There's one thing that everybody who has used it does know, and that is that it is a sure cure for boils. If applied for two or three days according to directions, and at the proper stage, the boil is sure to disappear. As a proof of its merit I have sold seven hundred and forty-eight thousand bottles this year.' "'At a dollar a bottle?' said I. "'That is the retail price,' said he.