The Line Box
Roughly 5x7 feet, it's essentially a wood and metal box with small seat inside, a caged door, and an intricate contraption atop of it that connects to a wire. It connects the Livingston Home and The Carriage House
Transportation
Dark Wood, warped with time; Old, strong metal, partially plated
a whole lot
mid-late 19th century
Humans can power it to move across the metal line by making skin contact with the top contraption.
Greg continually overexerts himself in order to try to get to Peter's room this way. The fact that only humans can power it is why the homunculi take in Greg.