Le Ber also was active in the cod fishery and West Indian trade including slaves.
In 1686, he built a stone mill on the Island of Montreal near the Ottawa River to provide the inhabitants of that area with a shelter in case of attack by the Five Nations.
Le Ber’s wife had died November 8, 1682, and two sons had also predeceased him: Louis, Sieur de Saint-Paul, who died in the early 1690s in La Rochelle where he had acted as his father’s business agent, and Jean-Vincent, Sieur Du Chesne, fatally wounded during an encounter with an English and Iroquois war party near Fort Chambly in 1691.
Three children survived their father: Jeanne Le Ber, Pierre, and Jacques, Sieur de Senneville.
Le Ber was buried in the church of the sisters of the Congregation of Notre Dame, the place where his famous recluse daughter lived and which she had largely funded.