graffiti definition in 1871

Charles Zangemeister`s definition in 1871 are called

graffiti (Zangemeister 1871: VII)1. Cut down the latin text strongly, I would summarize

Zangemeister`s still valid definition in Latin language like this: Graffiti is not manufactured

on the basis of a contract, but according to the discretion of private, depending on current

emotion, either because different writers wanted to record one's conduct, or derive a public

agitation.

1 Zangemeister, Karl: Inscriptiones Parietariae Pompeianae, Herculanenses, Stabianae. Berlin 1871