4 signed royal documents 19th century

SIGNED ROYAL DOCUMENTS (4). JOHANN I (1801-73), king of Saxony. Appointment for Ferdinande von Zschinsky, dated Dresden 1856, document signed, in 4to (cut to margins) with paper seal
ERNEST AUGUSTUS, king of Hanover, duke of Cumberland (1772-1851). 2 autograph letters signed, 1 dated 21 august 1834, one 1836 (date on envelope), small 8vo, 1 with upper part of envelope.
WILHELM IV (1765-1837), king of United Kingdom and king of Hanover, third son of Georg III. Letter dated St. James´s place 1832.
LOUISE OF SWEDEN (1851-1926), Queen of Denmark as the spouse of King Frederick VIII. She was the only surviving child of Charles XV of Sweden and his consort, Louise of the Netherlands. Autograph letter signed, in 8vo, 2 1/2 pages, dated 1865, to her aunt.

Johann I - document cut, Ernest Augustus and Wilhelm IV - letters mounted on paper to upper part, otherwise some folds, minor spotting