Title: Correspondence
Subjects: Correspondence, Academy of Natural Sciences of Philadelphia, Herbarium
People: George Engelmann (1809-1884), Isaac C. Martindale (1842-1893), John Howard Redfield (1815-1895), Elias Durand (1794-1873), William Marriott Canby (1831-1904), Thomas Meehan (1826-1901)