Asher B. Durand (1796–1886), a central artist of the Hudson River School, spent nearly twenty-four years as a successful commercial engraver. His talent as an engraver was based on his drawing skills, explaining his insistence on the importance of outline, the precise renderings in his sketchbooks and drawings, and his devotion to sketching with graphite outdoors. The artist’s empiricism and dedication to Nature is evident in the ten sketchbooks (two fragmentary from sketchbooks now disassembled), 310 drawings, and 79 paintings held by the Historical Society, where they are joined by an extensive trove of objects, documents, and prints that make it the largest single Durand collection extant.