Henry's ability to make friends with both the French and their allied Indians greatly facilitated his trading activities. Between 1762 and 1763, Henry did business at Sault Ste Marie, where he formed friendships with Jean Baptiste Cadotte, Sr. (father of Michel Cadotte) and Sir Robert Davers. However, when they returned to Michilimackinac, Chief Pontiac had already invoked his Indian uprising against British posts in the North West. The Ojibwa warriors famously attacked Fort Michilimackinac. Danvers was killed and Henry, after hiding for a time in the house of Charles Michel de Langlade, was captured by the Ojibwe.