Definition of "questor"

In this review of Brutus's army, who was under the command of gallant men, not braver officers than true patriots, he tells us, "that Sextus, the questor, was paymaster, secretary at war, and commissary general; and that the sacred discipline of the Romans required the closest connexion, like that of father and son, to subsist between the general of an army and his questor.

1742, Samuel Johnson, The Works of Samuel Johnson, Vol. 6‎

I quitted the National Assembly, where a questor to succeed General Negrier, who was killed in June, was being nominated, and went to M. de Chateaubriand's house, No. 110, Rue du Bac. I was received by M. de Preuille, son-in-law of his nephew.

1815, Victor Hugo, The Memoirs of Victor Hugo‎

Antony had occupied the high offices of questor and tribune, the first calling for literary ability, the second for skill as an orator.

1916, Elbert Hubbard, Little Journeys to the Homes of the Great, Volume 7‎