339. The subject of a finite verb is in the nominative.
Caesar Rhēnum trānsīre dēcrēverat. (B. G. 4.17)
Cæsar had determined to cross the Rhine.
For the omission of a pronominal subject, see § 295.a.
a. The nominative may be used in exclamations.
Ēn dextra fidēsque! (Aen. 4.597)
Lo, the faith and plighted word!
Ecce tuae litterae dē Varrōne! (Att. 13.16)
Lo and behold, your letters about Varro!
Note— But the accusative is more common (§ 397.d).