From Omar Khayyam to Edward FitzGerald to us: “The Moving Finger writes: and, having writ,/Moves on: nor all thy Piety nor Wit/Shall lure it back to cancel half a Line,/Nor all thy Tears wash out a Word of it.” But the Finger is indelible, and so is the Pen. The Pencil?

The Moving Pencil, lured by misdirection,
Need not move on through doom or predilection:
The aft end offers quick and easy means
To quickly turn back time and make correction.

My favorite pencil to use is the Dixon Ticonderoga Black #2.