Tales from the Ether:
Ausonian Stalter: The sewers of the Martian city-states are complete ecosystems unto themselves, breaking down the wastes of the city into gasses (for heating and light) or organic fertilizers. So efficient is this ecosystem (at breaking down organic material) that it is lethal to any Martian. When a murderous beast begins a reign of terror and then takes refuge in the sewers, it is obvious that the beast is not of Martian origin. It is also clear that only adventurers not of Martian origin could follow it into the sewers and stop it.
More Tales from the Ether:
The Lurker in the Moor: The botanist Dr. Van Warren lost his life in the search for knowledge. His daughter needs your help to secure his everlasting fame by bringing back specimens of a rare and extremely beautiful orchid from the depths of the Mylomeroen Swamp. The swamp is filled with dangers, however: Hill Martian pirates, deadly animals, nearly impassible terrain, and—worst of all—the lurker.
Madness in the Moab. Dr. Fairbanks and an assistant are long overdue from their expedition into the trackless wastes of the Moab, and a reward of £500 has been offered for news of the doctor's fate. The question is, is it worth £500 to travel into the Moab?
The Mystery of Fort Dickerson. The garrison of remote Fort Dickerson has been massacred, and the fort's civilians are missing. The main clue is an enigmatic message, the word "Seleti" painted on a wall—in blood
Space Gothic:
VollpensionVictoriana von Cubicle7: da passt so einiges, zB The Marylebone Mummy
Cthulhu:
Return of the Ripper, hat einen relativ großen Anteil an Übernaturlichem, passt daher vielleicht nicht in Deine Vorstellung von Sp1889.