Title: Correspondence
Subjects: Correspondence, Opuntia, Botanical specimens, Diseases, Mammillaria (Cactus), Yucca, Haage & Schmidt, Echinocactus, Liliaceae, Identification, Cereus, Foot, Pinaceae, Treatment
People: George Engelmann (1809-1884), C. C. Parry (1823-1890), A. L. Siler (1824-1898), Thomas Meehan (1826-1901)