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.
Duke of Orléans Duke of Orléans (French: "Duc d'Orléans" ) was a title reserved for French royalty, first created in 1344 by Philip VI in favor of his son Philip of Valois. Known as princes of the blood ("princes du sang"), the title of Duke of Orléans was given, when available, to the oldest brother of the king. Thus, they formed a collateral line of the French royal family, with an eventual right to succeed to the throne should more senior princes of the blood die out.