Somebody wrote a text in Latin, let’s call her Alice and let’s call the text De Nihilo. This text was then translated into German by Bob. In my work, I translate Bob’s translation into English.
In the author–date system of the CMoS style, I have adopted this solution for referencing a translation of an already translated text:
My own translation of the following translation from Bob. (Bob 1987; translation in German of De Nihilo by Bob).¹
¹ “[Latin Text]” (Alice 47BC).
Is my solution the correct one?