In the sculpture park at the Pratt Institute in Brooklyn, one of the nation’s oldest art schools, a clandestine struggle is under way — over grammar. In recent months, a vandal (or team of vandals) has used permanent markers to correct grammar and punctuation mistakes on the informational placards near the sculptures.

I posted fliers around the Pratt campus in an attempt to find the person or persons responsible. I’m perplexed that someone would do this. Who is so devoted to the park, and to the rules of grammar, that he or she would break the law to correct these mistakes?

I’ve heard of something similar, chronicled in the book “The Great Typo Hunt” by Jeff Deck and Benjamin Herson, two friends who toured the country correcting spelling errors on signs. The pair denied any involvement with the Pratt graffiti. “We no longer practice nor condone typo corrections without permission,” Mr. Deck wrote me. “Typo hunting must be done in the light, not in the shadow; speaking honestly with people who have made typos can yield far more valuable results in the long run. Even if, sometimes, your suggestions and observations only land you a kick in the pants.”

Copy-edited or not, the Pratt placards add something important to the mix of form and function at the park. I hope Pratt will continue issuing them whenever it installs new sculptures. And if Pratt decides to hire a copy editor, it seems at least one candidate has already applied for the job.