Which king, who reassumed the throne upon his son's death, had in his service the Flemish-born military engineer George Prosper Verboom?
Marquis of Verboom George Prosper Verboom, also known as Jorge Próspero de Verboom (9 January 1665 in Brussels – 19 January 1744 in Barcelona, Spain), was a Flemish-born military engineer in the service of the King of Spain. On 9 January 1727, King Philip V of Spain granted him the title of Marquis of Verboom.
Louis, Grand Dauphin Louis of France (1 November 1661 – 14 April 1711) was the eldest son and heir of Louis XIV, King of France, and his spouse, Maria Theresa of Spain. As the heir apparent to the French throne, he was styled Dauphin. He became known as Le Grand Dauphin after the birth of his own son, "Le Petit Dauphin". As he died before his father, he never became king.