NILES' WEEKLY REGISTER, Baltimore, Sept. 11, 1819  Inside has excerpts from the recently published "Declaration of the Independence of Texas" which concerns the Adams–Onís Treaty, signed in type: James Long, President of the Supreme Council.
Sixteen pages, 6 by 9 1/2 inches, very nice condition.

As noted in Wikipedia, this title: "...(was) one of the most widely-circulated magazines in the United States...Devoted primarily to politics...considered an important source for the history of the period."