For those below, who have cast aspersions on the concept of drafting with ink in combination with scale rulers or any number of analog devices, French Curves, Protractors, etc.. (all replaced by CAD programs before most of you were born), I would remind you of the humble (and clever) Ruling Pen:
Once upon a time, all formal architectural drawings were originated in pencil, and then inked with a ruling pen. The pen was dipped in India Ink, a small portion of ink was retained between the pen's adjustable jaws (adjustable to set the line-width), and the pen was carefully supported against, and drawn along the edge of the appropriate guide tool to ink over the the corresponding pencil line.
These pens, and the similar attachments for a Compass, required a lot skill to use, but were the standard "drafting pen" used for decades. It's safe to say that drawings for any project or building, from a Frank Lloyd Wright home to the Chrysler Building, were all created with these same tools.
Years later, ruling pens were replaced by the Rapidograph pen, but drawings were still inked by drawing their tips along the same guides used earlier with ruling pens. So, ink and rulers or guides certainly have been used together. Before computers, there was no other way.
Meantime, I advise everyone to purchase one of these sets--not because you'll use them together, but because they're both kind of cool separately, and they're reasonably priced ;- )