Complex sentence: With the tantilizing promise of free land, they came to clear thick forest for the road, plentiful stands of white pine and boom logs down rivers destined for the mills in Ottawa and then on to the rapidly expanding American and European markets hungry for timber.
Split into simpler sentences: With the tantilizing promise of free land, they came to clear thickly forest backcountry for the road, with its plentiful stands of white pine. Logs were boomed down rivers destined for the mills in Ottawa and then on to the rapidly expanding American and European markets hungry for timber.