Sitting before you is a mass of gears, clogs, wooden armatures and springs. This messy, bulk device can talk to its mate across any space. Each of these is made in pairs, and each one holds a special crystal that was split into two pieces and each have put into one of the Aetherschreibers, allowing them to listen to each other, and to speak to one another. The clock work armature turns the movement of the attached pen into vibrations the travel into the crystal and so into the aether and back out through the mate crystal and back into vibrations that move the armature (with the aid of clockwork) to write on paper what was written.
Adapted from Newton’s Cannon and A Calculus of Angels, Books One and Two of The Age of Unreason written by J. Gregory Keyes