From a comedy by Plautus:

Calidorus: Take this letter, then tell yourself what misery and concern are wasting me away.
Pseudolus: I will do this for you. But what is this, I ask?
Calidorus: What's wrong?
Pseudolus: In my opinion, these letters are seeking children for themselves: one mounts the other.
Calidorus: Are you mocking me with your teasing?
Pseudolus: Indeed, by Pollux I believe that unless the Sibyl can read these letters, nobody else can understand them.
Calidorus: Why do you speak harshly about these charming letters and charming tablets, written by a charming hand?
Pseudolus: By Hercules I beg you, do even hens have hands like these? For indeed a hen wrote these letters.

— Plautus, PSEUDOLUS, 21-30 —
found on the Wikipedia page about Roman cursive, at http://en.wikipedia.org/wiki/Roman_cursive

It's not exactly a comment on handwriting, but a few years ago I combined an epigram by Martial with an exemplar of a handwriting style found in Pompeii. I’ve updated that giggle by adding in an exemplar of the same epigram in a Zanerian script. Take a peek!

I have to say I liked it better (and found it more legible) in the Pompeiian graffiti style.

;-)

Hmpf! Spoilsport.

<pat> <pat> Richard, I thought the Zanerian was rather wonderful.