Priori Remo (dat) auspicium venisse dicitur: sex vultures; iamque nuntiato auspicio (neut. abl. sing.), duplex numerus Romulo (dat) se ostendit.
The omen came first to Remus: six vultures; and just then the news by an omen, twice the number made itself known to Romulus.
Do I have these cases (as indicated) right?