He also engraved maps and drawings for publication. One of his most important projects was to make copies of all of the maps and drawing that were included in Captain John C. Frémont's report to Congress. During the course of his work, Bruff got to know Frémont and many other topographical engineers when they returned from exploring the West.
He also created maps and drawings for publication. One of his most significant tasks was to duplicate all of the maps and drawings included in Captain John C. Frémont's report to Congress. During the course of his work, Bruff became acquainted with Frémont and other topographical engineers who returned from exploring the West.