Complex sentence: The Province of Cagayan at that time consisted of all towns from Tumauini to Aparri in the north and all other towns from Ilagan, Roxas southward to Aritao comprised the Province of old Nueva Vizcaya.
Split into simpler sentences: The Province of Cagayan at that time consisted of all towns from Tumauini to Aparri in the north. All other towns from Ilagan, Roxas southward to Aritao comprised the Province of the old Nueva Vizcaya.