Complex sentence: When local beachcomber-trader Jacques Guilloux went aboard and notice certain peculiarities such as iron grilles on the hatches and concealed daggers on the Captain and supercargo, he told Father Laval that he thought the ship was a slaver, and Laval advised the Queen.
Split into simpler sentences: When local beachcomber-trader Jacques Guilloux went aboard and notice certain peculiarities such as iron grilles on the hatches and concealed daggers on the Captain and supercargo. He advised Father Laval that he thought the ship was a slaver, and Laval advised the Queen.