"When our government took its place among nations, its statesmen were guided by the treatises of Grotius, Barbeyrac, Puffendorf, Bynkershoek, above all, Vattel. 1 Vattel was used 1792-1795 by President Stiles at Yale for instruction." Pg. 516.
"In WILLIAM AND MARY COLLEGE, President Lyon G Tyler states that the Law of Nations was taught first by the Professor of Moral Philosophy in 1779, and continuously since the text book being Vattel until 1861. This seems to have been at Jefferson's suggestion." Pg. 518
Immigration and National Act 1995 by Diane Publishing Company page 285