An Abominable Mystery is the second Charles Darwin memory: a plant no botanist recognises is making people in a Westminster park delirious. You investigate the flower beds, follow tracks to a cart full of the plants and then use their pollen against pursuers while driving Darwin to a safe disposal spot.
Part 2 of 6 in Charles Darwin's London Stories
Inspect three patches of the plant, sabotaging each one. Footprints near the last lead to a Blighter cart loaded with the flowers; chase it down and steal it, then take it to Darwin. He realises the pots, not the plants, are giving off the fumes, and suspects a drug similar to the Soothing Syrup. With Darwin aboard, other Blighter carts give chase. Drive in front of them so the pollen cloud disables them, then reach a safe place and blow the cart up with explosives.
Darwin wonders who would want to poison Londoners now that Elliotson is gone. The twins tell him they are fighting the same organisation Elliotson belonged to. He does not press for details but urges them to keep fighting.
Meet Darwin in the park, investigate and sabotage the three flower patches, follow the footprints, steal the Blighter cart, deliver it to Darwin, lose the pursuers and destroy the cargo.
Both optional objectives use the pollen. In the cart chase, keep your carriage directly ahead of each pursuing Blighter cart so it drives through the cloud and loses control. For the other condition, shoot a Templar while he is standing inside a pollen cloud.
A Struggle for Existence
A Struggle for Existence is the fifth Charles Darwin memory: Florence Nightingale tells you a policeman has hauled Darwin away, and the two of you go after him. You kidnap the officer for answers, then fight through a Templar hideout while Nightingale treats Darwin.
Cruel Caricature
Cruel Caricature is the fourth Charles Darwin memory: posters showing Darwin as an ape under the slogan "We are not apes" are going up around London. You tear them down, catch a billposter and follow the trail to an underground print shop that you blow up.
Darwin's Orchid
Darwin's Orchid is a short Charles Darwin memory from The Darwin and Dickens Conspiracy: a rare orchid from Madagascar is waiting for Darwin at the docks, and a rival has sent thugs to take it first. You race across the river, grab the flower off a boat and bring it back.
Defamation
Defamation is a short Charles Darwin memory: Darwin asks you to fetch him a newspaper, and you find a Blighter bullying the newsboy. A foot chase follows, and the thug's leaflet shows that someone is paying to spread attacks on Darwin.