Flagstaff (Ariz.) Lowell ObservatoryAnnals of the Lowell Observatory, Vol. 1.
Boston, Houghton, Mifflin & Co., 1898.
Percival Lowell (1855-1916) an American planetary astronomer, was best known for his observations, depicted here, indicating (incorrectly) a canal network, and therefore intelligent life, on Mars.
The Dudley Observatory