FROM: The 20th Century Biographical Dictionary of Notable Americans, Vol.6, p.286 KOEHLER, John Daniel, Moravian bishop, was bern near Stendal, Saxony, Prussia, Aug. 25, 1737. He was educated at the University of Halle and became a minister of the Moravian church. He was sent to America in 1783 and became pastor of the church in Salem, N.C. He was elected bishop of the Southern district and consecrated, May 9, 1790. He returned to Europe in 1801, to attend the general synod, and that body decided that he should remain in Europe. He died in Saxony, Prussia, Jan. 28, 1805. KOEHLER, Sylvester Rosa, author, was born in Leipzig, Germany, Feb. 11, 1837. His grandfather was a musician and composer, and his father was an artist. In 1849 he immigrated to the United States, where he continued his classical studies and made his home in Boston, Mass. He was married, April 9,1859, to Amelia Susanna Jarger. He devoted himself especially to the criticism of art, and edited the American Art Review; lectured on engraving and kindred subjects before the Lowell institute, Boston, the Drexel institute, Philadelphia, Pa., and the U.S. National Museum, Washington, and was a well-known contributor to American and European periodical literature. He was regarded as an authority on all matters connected with the chalcographic and reproductive arts, and for several years before his death was curator of prints in the Museum of Fine Arts, Boston, building up what was at the time of his death the only great print department in an American museum. He published translations of Von Betzold's: Theory of Color (1876), and Lalanne's Treatise on Etching, with notes (1880); and is the author of: Art Education and Art Patronage in the United States (1882); Etching, an Outline of Its Technical Processes and Its History, with Some Remarks on Collections and Collecting (1895). He also wrote the text for Original Etchings by American Artists (1883); Twenty Original American Etchings (1884); American Art (1887); edited the United States Art Directory and Year Book for 1882 and 1884, and at the time of his death was at work on an extensive history of color printing. He died at Littleton, N.H., Sept. 15, 1900.