The play Julius Caesar? [act 3]?

publius cimber,the name is shakespeares invention,plutarch gives two accounts of this petition,in Caeser page 92-93,and in Brutus page 123-124.old billy shakespeare follows the last closely:'one Tullius Cimber made humble suit for the calling home again of his brother that was banished.they all made as though they were intercessors for him,and took him by the hands and kissed his head and .'