The humble but legal rights of concubines and natural children are stated in the Institutes, (l. i. tit. x.,) the Pandects, (l. i. tit. vii.,) the Code, (l. v. tit. xxv.,) and the Novels, (lxxiv. lxxxix.) The researches of Heineccius and Giannone, (ad Legem Juliam et Papiam-Poppaeam, c. iv. p. 164 - 175. Opere Posthume, p. 108 - 158) illustrate this interesting and domestic subject.