Will Bradley (American, 1868 – 1962)

Beard (American, 20th Century)

Anonymous

Shari Weisberg (American, 20th Century)

Johann Georg van Caspel (Dutch, 1870-1928)

James Warwick (American, 20th Century)

Richard Halls (American, 1906 - )

Arthur Allen Lewis (American, 1873 - 1957)

Charles Buckles Falls (American, 1874-1974)

Anonymous

NASA (American, 1958 -)

Bristow Adams (American, 1875 – 1956)

Edwin Howland Blashfield (American, 1848 - 1936)

WES (American, 19th/20th century)

Julius Adolph Schweinfurth (American, 1858 - 1931)