 For this reason Charles had in the Treaty of Dover explicitly reserved his rights to come to the aid of the Spanish Netherlands should his interests demand so; Louis had to delay the execution of his plans in this region until the Dutch affair was finished.Now that a deadlock had been reached, Louis' patience was severely tried.Emperor Leopold had promised in 1668 that after the death of the sickly Charles II of Spain, the area would be ceded to France, but against expectations he survived until 1700.