In 1792, he published the first English translation of A Short Account of the Mohawk Indians, their Country, Language, Figure, Costume, Religion, and Government (1644), compiled from letters written by Dutch minister Johannes Megapolensis to friends about his years of ministry near present-day Albany, New York.

During his tenure as Postmaster General under the new Federal Constitution, Hazard reorganized the Post Office.

[3] Hazard did not keep President George Washington's favor, however, because during the Constitutional Convention, he had put a stop to the customary practice by which newspaper publishers were allowed to distribute copies by mail.

He said that it was doing "mischief" by "inducing a belief that the suppression of intelligence at that critical juncture was a wicked trick of policy contrived by an aristocratic junto."

Long interested in history,[3] in 1792, he printed the first English translation of Johannes Megapolensis' A Short Account of the Mohawk Indians, their Country, Language, Figure, Costume, Religion, and Government, first published in the Netherlands in 1644.