Why did the wine-seller, ernest defarge, admonish gaspard by placing his hand on the prankster's heart?

This question is based on the novel "A Tale of Two Cities" that was written by Charles Dickens, and Ernest Defarge is one of the characters in this novel. He was the servant of Doctor Alexandre Manette. In this novel, he was also a wine-seller and he had criticized Gaspard by putting his hand on the prankster's heart because of writing "blood" in the wall using wine,

Is there more to this?

First person bc it uses the word i