This is an excerpt from “By Hound and Eye” by Geo. R. Walker and Jim Tolpin; illustrated by Andrea Love.
The height of the face changes in a progression equal to the size of the blades, which are called “shadows” when included in the face height.
Start by stepping out the two intervening blades plus three shadow blades.
Divide the remaining space into three parts – the primary drawer height.
Lay out the first face plus one intervening blade.
Lay out the second face increased in height by a blade. The space left over is the third face.
— Meghan Bates