1.   Armies would still cross national frontiers and with considerable capacity for doing damage where they fought and trod.

2.   Surely the House appreciates that some problems go beyond national frontiers, particularly those affecting pollution and international trade.

3.   The output of such small-scale producers will not only be sold on local Markets but also across national frontiers.

4.   In taxonomic botany, for instance, research is carried out in many institutions world-wide, rather than within national frontiers.

5.   Economic ups and downs pay no heed to national frontiers and economic growth in Washington will have a knock-on effect this side of the Atlantic.

6.   Economically and culturally vibrant regions are asserting their identity and taking advantage of European integration to develop ties across national frontiers.

7.   Institutionally managed savings now slip across national frontiers like quicksilver, sapping the power of governments to finance themselves through inflation.

8.   National frontiers were fiercely guarded by soldiers and customs men.

9.   The sale represents a remarkable shift for the British company, one of the first to venture beyond national frontiers for new business.