19. Dion Cassius (l. liii. p. 703-714) has given a very
loose and partial sketch of the Imperial system. To
illustrate and often to correct him, I hav meditated
Tacitus, examined Suetonius, and consulted the following
moderns: the Abbe de la Bleterie, in the Memoires de
l'Academie des Inscriptions, tom. xix. xxi. xxiv. xxv.
xxvii. Beaufort Republique Romaine, tom. i. p. 255-275. The
Dissertations of Noodt and Gronovius, de lege Regia;
printed at Leyden, in the year 1731. Gravina de Imperio
Romano, p. 479-544 of his Opuscula. Maffei Verona
Illustrata, t. i. p. 245 etc.