Before there were little green Martians and tall blond Venusians, there were deros.
In the 1930s a Pennsylvania man named Richard Sharpe Shaver overheard them speaking through his welding equipment. And the voices — singularly unpleasant ones, obsessed with torture and sexual perversion — would not shut up. Their incessant chatter drove Shaver to desperate acts that landed him in mental hospitals and prisons. While Shaver was serving time in a prison, a woman materialized and whisked him away to a cavern underneath the Earth where she and her fellow teros, though badly outnumbered, battled the dero hordes.