NILES' NATIONAL REGISTER, Baltimore, March 7, 1840  Page 3 has: "The Amistad" which is essentially a letter headed "The Amistad Africans" which begins: "We have no doubt the interference of the British government in the matter of the Amistad Africans was well enough intended, though we fear it will do more hurt than good..." with more.
This famous slave ship and the revolt of its occupants was not only a notable legal case at the time, but in 1997 was made into feature length movie by Stephen Spielberg.
Sixteen pages, 8 1/2 by 12 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."