Although not a poetry aficionado, I am aware that “Leaves Of Grass” by Walt Whitman is considered a seminal work in 19th century literature. So when I stumbled across a small article on page 7 of a New York Tribune issue dated Oct. 10, 1855  I took a moment to read it. Most of the report is taken up with a letter signed in type: R. W. Emerson, so my interest was piqued.
After a number of Google searches I discovered this report to be much more significant that I might have thought.
Although considered highly controversial during his era, “Leaves of Grass” has infiltrated popular culture & been recognized as one of the central works of American poetry. As such, the article is interesting, mentioning in part: “…call the attention of our readers to this original & striking collection of poems, by Mr. Whitman…could not avoid noticing certain faults which seemed to us to be prominent in the work. The following opinion, from a distinguished source, views the matter from a more positive and less critical stand-point:…” and what follows is the famous letter by Ralph Waldo Emerson–who inspired this work by Whitman–in which he comments: “…I find it the most extraordinary piece of wit and wisdom America has yet contributed…I am very happy in reading it, as great power makes us happy…” and even more, signed in type: R. W. Emerson. This original letter is in the Library of Congress.
This letter’s appearance in the Tribune would seem to be the only newspaper printing of the time, as records indicate that the: “…letter to Whitman from Ralph Waldo Emerson, 21 July, 1855 is among the most famous letters ever written to an aspiring writer…Without asking Emerson’s permission, Whitman gave this private letter to Charles Dana [managing editor of the New York Tribune] for publication in the New York Tribune on October, 1855.” (see this hyperlink ).