Mars, by Percival Lowell, 1895 - Astronomer Lowell did not consider this a work of fiction, let alone science fiction, when he first published it over a hundred years ago, but it worked out that way. HTTP://www.bibliomania.com/NonFiction/Lowell/Mars/index.html
Percival Lowell (1855-1916) - Short biography. www.physics.gmu.edu/classinfo/astr228/CourseNotes/ECText/Bios/lowell.htm