The time frame is roughly the 1890s.

"Baron Trump's Marvelous Underground Journey" is published in 1893.

Nikolai Tesla is alive during this time period.

Thomas Edison is alive during this time period.

Tesla was a genius and "way ahead of his time"

Did Baron Trump bring Tesla back to the 1890s from the future?

Edison knew… or he was told.

Edison was Deep State commissioned to steal from & destroy Tesla's technology.

Tesla built a human clone device and time travel machine.

Edison was desperate to steal this technology.

Tesla built it for Borden… Borden cloned himself.

Borden destroyed the machine, as instructed by Tesla.

Angier didn't know and killed his clones… several times, passing this off as "magic"

Who was hanged? Borden or Fallon?

Who killed Angier? Borden or Fallon?

Where and when did Baron Trump travel to & from?

Why is Baron Trump's guide in the book a man named "Don"?

Who sent Baron?

Who built Baron's Time Travel machine?

Tesla?

Who currently has all of Tesla's secrets?

Did Fallon know he was a clone?