Sivas Travel on Adams argued that these men who had been bound for slavery were free men, kidnapped from Africa, and should be allowed to return. The U.S. Supreme Court agreed and allowed the men to return to Africa. Adams continued to be a vocal advocate for internal improvements as well as investment in scientific research. His work focused on founding the Smithsonian Institute and a failed attempt to establish a federal astronomical observatory. Adams was also a vocal opponent of the MEXICANAMERICAN WAR. Sivas Travel 2016.