As Everywhere of Silver — Silverfish

Silverfish consumes books. No rules with binding power can prevent it from damaging the content of books, a mock at someone with silver tone.

As Everywhere of Silver
With Ropes of Sand
To keep it from effacing
The Track called Land.

(F.931/J.884)

[1] Silver:: a hint on silverfish; a person with eloquent tone, or persuasive speech.
[2] Ropes of Sand:: the consumed waste left by silverfish; rules without binding power _{(OED rope II.5b, 1624)}. We cannot tell the silverfish not to efface a book's content.
[3] effacing:: erasing a book's content.
[4] Track called Land:: the territory marked by silverfish's track of eating.