It would indeed be an interesting task to trace the public influence of this last demonstration, for it offered phases of interest to both parties. It is sufficient to say, that the Era's unmolested existence ever after was simply due to the instincts of self-preservation in the community. The issue was practically presented to the owners of real estate in the District, whether freedom of debate on all topics of public concern should be tolerated there, or the capital be removed to some Western centre. The bare possibility of this event was more than the slaveholding land-owners could face, and produced the desired effect. The continuance of the paper once acquiesced in, the tact of its editor, aided by that remarkable suavity of manners which made him a favorite in the private circles of Washington, was sufficient to forever forbid the probability of a second mob. And thenceforward the Era increased in influence as well as circulation. The latter, indeed, soon reached a figure which entitled it to a share of government patronage, while the former commanded the respect even of the enemies of the cause it defended. But this is not all that is to be said of the Era. To that paper belongs the honor of introducing to the world the story of "Uncle Tom's Cabin." Although reference has frequently been made to the origin of this wonderful fiction, the facts of its inception and growth have never been given to the public. These are so curious, that we are happy to be able to present what politicians would call the "secret history" of this book. The account was furnished to a friend by Dr. Bailey himself, when about to embark for Europe, on his first voyage for health, in 1853; the manuscript, now used for the first time, was hurriedly penned, without expectation of its appearance in print, and therefore has all the dashing freedom which might be looked for in a communication from one friend to another. We give it _verbatim_, that it may serve for a _souvenir_, as well as a contribution to the literary history of the time. "NEW YORK, May 27, 1853.