Pratlow Street
HomunculusPratlow Street is the location of Dr. Ignacio Narbondo’s laboratory and a concealed center of the novel’s interlocking experiments, criminal dealings, and investigations. At the address, fish are delivered and studied, the dead are prepared for experiments, and hidden passages make the laboratory both a place of secret work and a point of sudden danger.
The laboratory and its materials
The laboratory stands above Pratlow Street, reached by a narrow staircase. Its work depends not only on Narbondo and his assistant, Willis Pule, but also on the animals and equipment gathered inside. Vast aquaria hold water plants and large koi; Narbondo feeds them worms and watches one fish struggle to remain at the surface. He later extracts a small gland from a carp and preserves it in a vial. The careful handling of the specimen makes the fish part of the laboratory’s practical apparatus, rather than mere decoration.
Carp arrive at the address through ordinary street traffic. Pule directs a boy to take a load of them to 266 Pratlow Street, with instructions that the fish must still be breathing when they reach Dr. Narbondo. The delivery shows how the laboratory’s experiments depend on a supply chain extending beyond its walls, and how routine errands can carry materials into a hidden scientific enterprise.
The laboratory’s procedures also draw in Shiloh, who seeks a demonstration involving Joanna Southcote. Narbondo considers staging a display to satisfy him, while privately worrying that Shiloh may become dangerous if the expected result does not occur. The address thus becomes a meeting point between experimental ambition and religious expectation, with Narbondo managing the appearance of success as well as the work itself.
Observation and discovery
Pratlow Street attracts attention before investigators understand what is happening inside the laboratory. Theophilus Godall, already investigating reports associated with Dr. Narbondo, approaches the street late at night. A lit window opens and a bundle is thrown into the road; Godall finds that it is a dead fish and leaves to consider what he has seen. The incident offers him a material clue to activity concealed indoors.
Godall’s broader deductions connect Narbondo’s apparent ability to revive the dead with the men he has encountered at The Blood Pudding. He suspects that Narbondo and Kelso Drake may be bargaining over the production of workers, or that Drake believes Narbondo can provide something once sought by Sebastian Owlesby. These are still hypotheses, but the laboratory on Pratlow Street gives the suspicions a concrete center: it is where the fish, the experiments, and the rumors of reanimation converge.
Hidden routes and the outbreak
The building’s concealed architecture makes the laboratory more than a closed room above a London street. An oak panel opens onto a dark, low passage, through which Pule and Dr. Narbondo bring a corpse into the room. The panel is then shut, hiding the entrance again. Later, Pule slips in through the street door and activates the hidden latch behind the panel, showing that the secret route can be used not only to bring things in but also to move discreetly through the building.
The hidden passage eventually exposes the danger that the laboratory has kept out of sight. Langdon St. Ives and Hasbro wait on the stairs rather than charge into the room, expecting whoever has taken the Keeble box to leave by the street entrance. Instead, the panel opens and two reanimated corpses emerge. The concealed route that had served Narbondo’s operations now delivers their consequences directly to the people waiting outside.
Narrative significance
Pratlow Street brings together the ordinary and the clandestine: a boy can carry live carp to a numbered address, while the building above the street conceals experiments, secret access, and reanimated bodies. Its significance lies in this physical connection between otherwise separate strands of the plot. Fish and their glands link the laboratory’s procedures to the larger problem of reanimation; Godall’s observations turn the street into an object of investigation; and the hidden panel turns the building’s secrecy into a route through which danger can emerge. The location is therefore both Narbondo’s working base and the point where his concealed activity becomes impossible for others to ignore.

