Every sham, as has often been said, proves some reality. Petroleum exists, no doubt, and is an important addition to our national wealth. But the Petroleum humbug or mania or superstition, or whatever you choose to call it, is a humbug, just as truly, and a big one, whether we use the word in its milder or its bitterer sense. There are more than six hundred petroleum companies. The capital they call for, is certainly not less than five hundred million dollars. The money invested in the notorious South Sea Bubble was less than two-fifths as much--only about $190,000,000. Now, this petroleum business--very much of it--is just as thorough a gambling business as any faro bank ever set up in Broadway, or any other stock speculation ever conjured up in Wall Street--as much so, for instance, as the well known Parker Vein coal company. I shall here tell exactly how those well known and enterprising financiers, Messrs. Peter Rolleum and Diddle Digwell proceeded in organizing the New-York and Rangoon Petroleum Company, of which all my readers have seen the advertisements everywhere, and of which the former is the Vice President and managing officer, and the latter Secretary. In June 1864, neither of these worthy gentleman was worth a cent. Rolleum shinned up and down in some commission agency or other, and Digwell had a small salary as clerk in some insurance or money concern. They barely earned a living. Now, Rolleum says he is worth $200,000; and Mr. Secretary Digwell, besides about $10,000 worth of stock in the New York and Rangoon, has his comfortable salary and his highly respectable "posish"--to use a little bit of business slang. Mr. Rolleum was the originator of the scheme, and let Digwell into it; and together they went to work. They had a few hundred dollars in cash, no particular credit, an entirely unlimited fund of lies, a good deal of industry, plausibility, talk, and cheek, considerable acquaintance with business, and an instinctive appreciation of some of the more selfish motives commonly influential among men. First of all, Rolleum made a trip into the oil country. Here, while picking up some of his ordinary agency business, he looked around among the wells and oil lands, talking, and examining and inquiring of everybody about everything, with a busy, solemn face, and the air of one who does _not wish_ it to be supposed that he has important interests in his care. Then he talked with some men at (we will say) Titusville and thereabouts; told all about his valuable business connections in New York City: and after getting a little acquainted, he laid before each of half-a-dozen or so of them, this proposition: