Interprovincial commerce is free, and the home market is greatly increasing in importance.
Her splendid lakes and rivers, the development of her canal system, and the growth of railways have made the interprovincial traffic of Canada far greater than her foreign, and the portfolio of railways and canals is one of the most important in the cabinet.
Interprovincial wars frequently altered its boundaries, notably in 332 when the three Collas, sons of Eochaidh Doimhlein, conquered the land between the river Boyne and Lough Neagh, which became a separate kingdom under the name of Uriel (Oriel or Orgial).