Which accusative is this?

Latin Learning Latin
1

Salvete amici amicaeque!

I’m working through Caesar and I was wondering which Accusative construction this is:

It’s from Caesar 1.5:

…oppida sua omnia, numero ad duodecim, vicos ad quadringentos…

If I understand correctly, “numero ad duodecim” means “numbering 12.”

Does this structure have a name?

Gratias maximas vobis ago.

2

Minimè, “numero circiter duodecim” significatur. Ad praepositio casui accusativo servit, ut semper solet.
No, “numbering/by number about [as in “towards”] 12” it means. The preposition “ad” takes the accusative as it always does.

3

Gratias, Adriane!