NILES' WEEKLY REGISTER, Baltimore, Dec. 18, 1819 

* Alabama Statehood 
* Early Florida - Adams-Onis Treaty

Somewhat inconspicuously noted within a report from Congress, with a dateline of December 14, is: "It being announced that the president had signed the resolution for the admission of Alabama into the union, Mr. Walker took his seat as a senator from that state." Thus, with relatively little congressional ceremony, Alabama became the 22nd state of the United States of America. Nice to have this report in a newspaper from so close to the nation's Capital, and which was essentially the mouthpiece of Congressional proceedings.
This issue also has much on: "Relations With Spain" which includes the historic Adams-Onis Treaty in which Spain ceded to East Florida to the United States & renounces any claims to West Florida which was already annexed by the United States. The U.S. renounces items claims to Texas (see for portions). It includes several documents signed by James Monroe and John Quincy Adams (see). This text takes nearly 12 pages.
Sixteen page issue, 6 by 9 1/2 inches, minor foxing to the front page only, very nice condition.

This small size newspaper began in 1811 and was a prime source for national political news of the first half of the 19th century. 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."