BELLONA’S HUSBAND (1887) – This book was written by West Point graduate (Class of 1867) William James Roe under the pen name Hudor Genone.
The novel’s main character, named Archibald Holt, invests in Professor Ratzinez Garrett’s project which centers on hydrogenium, the professor’s metallic form of hydrogen. This substance may be lighter than air but it is also very, very resilient.
Garrett constructs a disc-shaped spaceship that uses hydrogenium as its anti-gravity agent. Holt and Professor Garrett are joined by Trip, a shady friend of Garrett’s, who travels with them on a flight to the planet Mars.
As they approach the Red Planet, the trio discover that what Earthlings have named Phobos and Deimos are not really moons but are instead enormous abandoned spaceships which once transported large aliens from Jupiter and Saturn. Continue reading
MARS REVEALED (1880) – Written by Henry A. Gaston, this is another work that combines science fiction with religious and spiritual concepts. 
THE RAINBOW OF ADAMANT (1897) – Written by Charles Kelsey Gaines, this short story is an excellent example of how slowly word of scientific discoveries was spread in the 19th Century compared to our lightning-fast communications of today. The Rainbow of Adamant was written during the period when most of the world was still going by assumptions and theories about helium.
THE SICKLE OF FIRE (1896) – Written by Charles Kelsey Gaines, an American author who set this particular short story in British Columbia. The main characters are our narrator and a scientist named O.D. McKazy.
THE ARTIFICIAL MOTHER (1894) – This short story was written by George H. Putnam, who served in the Union Army during the U.S. Civil War and was also a Prisoner of War. He was part of the Putnam publishing empire and in 1901 authored the children’s story The Little Gingerbread Man.
A.D. 2000 (1890) – Written by Alvarado M. Fuller, this was one of the earliest imitations of Edward Bellamy’s 1888 work Looking Backward. The main character is a Cavalry Lieutenant named Junius Cobb.
With the cooperation of friends, Lt. Cobb seals himself away in a San Francisco replica of the Statue of Liberty with an alarm set to revive him in the year 1987. Due to a mathematical error, however, our main character is not awakened from suspended animation until the year 2000 A.D.
THE PLANET JUGGLER (1908) – Written by J. George Frederick. An early space opera set in an undesignated future year. Absurdly enough, Esperanto has become the global language in a reflection of the high hopes held by Esperanto speakers at the time this book was written.
CAPTAIN GARDINER OF THE INTERNATIONAL POLICE (1916) – Robert Allen Dodd wrote this story over one hundred years ago under the name Robert Allen. Narration informs us that the story is set 60 years after the conclusion of the then-raging World War. Since we know it ended in 1918 we can look forward to visiting the “far-off future” of 1978. 
DR. CUNLIFFE, INVESTIGATOR (1913) – Written by Harold Frankish. This book was a collection of short stories centered around Frankish’s fictional “scientific detective” Dr. Theodore Cunliffe.