Conversation so far:
When did the French contact the Algonquins?
in the summer of 1603.
How did they interact?
From 1603, some of the Algonquin allied with the French.
What else should I know about this period?
Champlain made his first exploration of the Ottawa River during May 1613 and reached the fortified Kitcisipirini village at Morrison Island.
What did he do there?
They had chosen a strategic point astride the trade route between the Great Lakes and the St.
Lawrence River.

Question: What else did he/they do?
Self-contained rewrite: What else did Champlain and the explorers do in addition to choosing a strategic point on either side of the St. Lawrence and Great Lakes trade route? St. Lawrence River?