It was a monorail balancing on a single rail of wheels by the aid of gyroscopic forces.
Unfortunately, not one of them fledged into a full-blown railway.
The gyro monorail was peculiar.
The first gyro monorail patent was filed by Irish-Australian engineer Louis Philip Brennan in 1903.
She suggests a trim little ferry-boat, and is utterly unlike any known form of railway car.
Now the track turns again, and she glides behind the bushes.
The demonstration in 1907 was largely a success.
Brennan demonstrated the monorail again at the Japan-British Exhibition at the White City, London in 1910.
This time the monorail car carried 50 passengers around a circular track at 20 miles per hour.
Among the passengers was Winston Churchill, whose presence helped Brennan garner great support for his monorail project.
It could accommodate four passengers on a pair of transverse bench seats.
But investors had already made up their minds.
Brennan died six years later in 1932 in a road accident.