In 1888, Werner Siemens received hereditary ennoblement as "von" Siemens by Frederick III, German Emperor. After his ennoblement, Linnaeus continued teaching and writing. Tolkien explores the theme of "the ennoblement of the ignoble". She blazed a trail in the field imbuing it with depth, maturity and ennoblement. Henrik's 1996 autobiography acknowledges the unsuccessful ennoblement. The date and circumstances of his ennoblement are not clear. Sometimes officers were rewarded with lands and ennoblement. Often, members of the lower szlachta sought further ennoblement from foreign, therefore less verifiable, sources. Newspapers reported his ennoblement the following morning. He died of the plague, the year after his ennoblement on December 13, 1565. His ennoblement ended his active political career. The post-independence constitution of 1919 forbade ennoblement, and all tax privileges were abolished in 1920. From his father's ennoblement in 1997 he was entitled to the style of The Honourable. Letters patent of ennoblement were issued by Louis XIV of France in 1655. From his father's ennoblement in 1988, he was entitled to the style of "The Honourable".