Uncle Tom's Cabin: the serialization before it became a book... A letter to the editor...

While the story was still being serialized, publisher John P. Jewett contracted with Stowe to turn Uncle Tom's Cabin into a book. Convinced the book would be popular, Jewett made the unusual decision (for the time) to have six full-page illustrations engraved for the first printing. Published in book form on March 20, 1852, the novel sold 3,000 copies on that day alone, and over 300,000 within the first year.

The complete serialization appeared almost entirely in the National Era before the book was published, with an overlap of just ten days. Subscriptions to the Era increased by nearly 5,000 during the serialization.
Also of special interest is a back page letter to the editor which comments very favorably on the series. It begins: "Sir: 'Uncle Tom's Cabin' increases in interest and pathos with each successive number. None of thy numerous contributors, rich & varied as they have been, have so deeply interested thy female reader of this vicinity as this story of Mrs. Stow has thus far done, and promises to do..." with more.
There were but a few issues of the Era which printed letters to the editor concerning the serialization.
Being an anti-slavery newspaper it is not surprising there are various slavery-related articles, several shown in the photos.
Four pages, never-bound condition just as sold on the streets. Minor wear at the folds & margins, a few, discrete archival mend inside, nice condition.  Folder size noted is for the issue folded in half.