He was born in 1817; the likelihood of his having been alive after 1959 and so non-PD-CA is miniscule. However, date of death has not proven possible to determine except "after 1859" or suchlike. Eric 03:44, 30 October 2009 (UTC)
Also, added a second Google-books link with a more extensive list of works and information (though still in German and still no death date.) And the Google books link (as I seem not to have noticed the first time, if it was I who added the first one) can indeed be truncated after the page number... Eric 18:52, 14 July 2010 (UTC)
