In LLPSI 2 'Roma Æterna', Chapter XLI 'Origines', it is written:
Ibi [Siciliâ] egressi Trojani, quibus ab immenso prope errore nihil præter arma et naves supererat, cum prædam ex agris agerent, Latinus rex Aboriginesque, qui tùm ea tenebant loca, ad arcendam vim advenarum armati ex urbe atque agris concurrunt.
I was wondering why egressi Tojani is used here instead of an ablative absolute egressis Trojanis, just as in mortuo Cæsare, which is a common example with another deponent verb. In LLPSI 1 there is an example of Hæc locuta, which is stated to mean the same as Postquàm hæc locuta est. However, I still do not understand why the ablative absolute is not used instead: Hæc locutâ (long â, ablative).
I have another question regarding this passage. Why is the verb agere used and not facere in the sense of make a bounty of: cum prædam ex agris agerent and not cum prædam ex agris facerent. I often have trouble mixing up these two verbs. Is there a rule of thumb to know when to use either?