Cum patris nomine et epistolas ipse dictaret, et edicta conscriberet, orationesque in senatu recitaret, etiam quaestoris vice. Suetonius in Titus c. 6.
The office must have acquired new dignity, which was occasionally executed by the heir apparent of the empire. Trajan intrusted the same care to Hadrian, his quaestor and cousin. See Dodwell, Praelection. Cambden. x. xi. p. 362-394