[Footnote 137: Institut. l. ii. tit i. ii. Compare the pure and precise reasoning of Caius and Heineccius (l. ii. tit. i. p. 69 - 91) with the loose prolixity of Theophilus, (p. 207 - 265.) The opinions of Ulpian are preserved in the Pandects, (l. i. tit. viii. leg. 41, No. 1.)]