Barnum was without peer in his use of advertising, newspaper articles, and what would now be called publicity stunts in his efforts to draw visitors to the American Museum. Much of his publicity relied on some kind of deception, as the example in this excerpt from his autobiography Struggles and Triumphs illustrates. But these deceptions, popularly known at the time as "humbugs," were intrinsic to his public image and drew a public eager to take part in succumbing to or unmasking the "humbugs" they felt sure to find at Barnum's museum.

From P.T. Barnum, Struggles and Triumphs, "The American Museum" 1869

It was the world's way then, as it is now, to excite the community with flaming posters, promising almost everything for next to nothing. I confess that I took no pains to set my enterprising fellow-citizens a better example. I fell in with the world's way; and if my "puffing" was more persistent, my advertising more audacious, my posters more glaring, my pictures more exaggerated, my flags more patriotic and my transparencies more brilliant than they would have been under the management of my neighbors, it was not because I had less scruple than they, but more energy, far more ingenuity, and a better foundation for such promises. In all this, if I cannot be justified, I at least find palliation in the fact that I presented a wilderness of wonderful, instructive and amusing realities of such evident and marked merit that I have yet to learn of a single instance where a visitor went away from the Museum complaining that he had been defrauded of his money. Surely this is an offset to any eccentricities to which I may have resorted to make my establishment widely known.
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While I expended money liberally for attractions for the inside of my Museum, and bought or hired everything curious or rare which was offered or could be found, I was prodigal in my outlays to arrest or arouse public attention. When I became proprietor of the establishment, there were only the words: "American Museum," to indicate the character of the concern; there was no bustle or activity about the place; no posters to announce what was to be seen; -- the whole exterior was as dead as the skeletons and stuffed skins within. My experiences had taught me the advantages of advertising. I printed whole columns in the papers, setting forth the wonders of my establishment. Old "fogies" opened their eyes in amazement at a man who could expend hundreds of dollars in announcing a show of "stuffed monkey skins"; but these same fogies paid their quarters, nevertheless, and when they saw the curiosities and novelties in the Museum halls, they, like all other visitors, were astonished as well as pleased, and went home and told their families and neighbors and thus assisted in advertising my business.

For other and not less effective advertising, -- flags and banners, began to adorn the exterior of the building. I kept a band of music on the front balcony and announced "Free Music for the Million." People said, "well, that Barnum is a liberal fellow to give us music for nothing," and they flocked down to hear my outdoor free concerts. But I took pains to select and maintain the poorest band I could find -- one whose discordant notes would drive the crowd into the Museum, out of earshot of my outside orchestra. Of course, the music was poor. When people expect to get "something for nothing" they are sure to be cheated, and generally deserve to be, and so, no doubt, some of my out-door patrons were sorely disappointed; but when they came inside and paid to be amused and instructed, I took care to see that they not only received the full worth of their money, but were more than satisfied. Powerful Drummond lights were placed at the top of the Museum, which, in the darkest night, threw a flood of light up and down Broadway, from the Battery to Niblo's, that would enable one to read a newspaper in the street. These were the first Drummond lights ever seen in New York, and they made people talk, and so advertise my Museum.