If I remember right, M.Alexander Speidel covered this topic in his article "Roman Army Pay Scales (1992)".
http://www.jstor.org/stable/301286?seq=1...b_contents
He came to the conclusion, that a prefectus cohortis got the same pay as an ordinary legionary centurio (13.500 HS pre-Domitian). And a tribunus militum or tribunus cohortis the same as a centurio primi ordinis (27.000 HS). Because equestrians often choosed to switch to a career as centurio of this rank.
A tribunus in the roman cohorts got more, because this promotion comes after primipilus (about 100.000 HS for a tribunus praetorio).
You may find the roman sources available in the footnotes of his article. Of course, some of Speidels figures are just a logical conclusion or best guess. We are still digging for the famous "Manual of the Roman Army".
PS: If you register on JSTOR, you can read 3 articles per month for free.
http://www.jstor.org/stable/301286?seq=1...b_contents
He came to the conclusion, that a prefectus cohortis got the same pay as an ordinary legionary centurio (13.500 HS pre-Domitian). And a tribunus militum or tribunus cohortis the same as a centurio primi ordinis (27.000 HS). Because equestrians often choosed to switch to a career as centurio of this rank.
A tribunus in the roman cohorts got more, because this promotion comes after primipilus (about 100.000 HS for a tribunus praetorio).
You may find the roman sources available in the footnotes of his article. Of course, some of Speidels figures are just a logical conclusion or best guess. We are still digging for the famous "Manual of the Roman Army".
PS: If you register on JSTOR, you can read 3 articles per month for free.
Ut desint vires, tamen est laudanda voluntas
