SPANISH NETHERLANDS. 2 L.S. by rulers, Brussels 1626-1636, to a reverend father; 1 page in-fol. or in-4 each. Isabella of Austria, Infanta of Spain, ruler of the Low Countries (1566-1633), April 4, 1626 (countersigned by Jean-Charles della Faille), concerning requests from the community of Meldert. Ferdinand of Austria, cardinal-infant (1609-1641), December 31, 1636. He informs of "the election made in Regensburg of the person of the King of Hungary [Ferdinand III] for King of the Romans" and asks that the Te Deum be sung.