Monmouth Manufacturing is an old brick warehouse located at 1136 Monmouth, Henrietta, Virginia. It was owned and used as a private residence by Richard Campbell Gansey III. Other residents included Ronan Lynch and Noah Czerny.
Monmouth Manufacturing is described as having a brick exterior except for the east-end which has the words Monmouth Manufacturing on the wall. It is built in an overgrown concrete lot that takes up the whole block of land and is gutted and black-eyed.
It also has twenty five foot ceilings and wide open spaces. Neither Gansey or Adam have any idea about what the factory used to manufacture, although it does have gouged brick walls and moisture stains on the floor. It smells like the good dusty smell of old books and the first story does indeed have nothing but dust, dirt and concrete.
The second story is where the boys live and has two rooms to house Ronan and Noah (and briefly Adam) while Gansey sleeps in the main room. The floor is cluttered with a cardboard model of Henrietta and the walls have boxes of other information from previous areas where Gansey has studied energy and ley lines.
Blue Sargent says the place reminds her of a messy explorer, an obsessed scholar and a mad inventor combined.