Boston: Manning and Loring, 1794. First American edition. 8vo (168 x 102 mm). Contemporary full tree calf, rubbing, spine ends mostly worn away, marginal toning to preliminary leaves; toning and intermittent spotting throughout; institutional stamp to title-page.

An Essay Concerning Human Understanding was originally printed in 1689. Though sharply criticized by rationalists and empiricists alike upon publication, the work is now considered a foundational work in enlightenment thought as well as the modern discipline of human psychology.