Amazingly, it turns out there are many guides to perfect eyebrows.

The 'use our pencil and all will be well" method

The "drawing eyebrows in a drawing" method

The eyebrow tattoo

The eyebrow dormer

The eyebrow stencil such as that used by Miss Yvonne

and a eyebrow patent

"And then the lover,
Sighing like furnace, with a woeful ballad
Made to his mistress' eyebrow."

--Shakespeare

“The eyebrows form but a small part of the face, and yet they can darken the whole of life by the scorn they express”-- Demetrius