Fugitive Poetry. 1600–1878/Grammatical Tautology

Grammatical Tautology.
I'll prove the word that I have made my theme
Is that that may be doubled without blame;
And that that that, thus trebled, I may use,
And that that that that critics may abuse
May be correct. Farther—the dons to bother—
Five thats may closely follow one another!
For be it known, that we may safely write
Or say, that that that that that man writ was right:—
Nay, e'en, that that that that that that followed
Through six repeats, the Grammar's rule has hallowed;
And that that that (that that that that began)
Repeated seven times is right!—Deny't who can.