Simplify the following text for a Grade 14 native English-speaking person.
Original: As an advocate for Samuel de Champlain and of the retention of Quebec , he founded the Compagnie des Cent-Associ Ã s and saw the Treaty of Saint-Germain-en-Laye return Quebec City to French rule under Champlain , after the settlement had been captured by the Kirkes in 1629 .
Simplified: As an advocate for Samuel de Champlain and of the keeping of Quebec , he founded the Compagnie des Cent-Associ Ã s and saw the Treaty of Saint-Germain-en-Laye return Quebec to French rule under de Champlain , after the settlement had been captured by the Kirkes in 1629 .