Fiorelli stated that at the end of this side of the insula, painted on the external wall was a divinita tutelare of the road, a serpent coiling around the trunk of a tree. Under this, in small letters, one used to be able to read INNVLVS ROGAT.
See Pappalardo, U., 2001, La Descrizione di Pompei per Giuseppe Fiorelli (1875). Napoli: Massa Editore. (P.41)