Blogger deleted all the posts I published yesterday May 12, 2011 as part of maintenance it performed on this site. I will retype the lost posts and publish new material on Monday May 16.
Einsam in trüben Tagen (Elsa's Dream) is a famous aria from the first act of Richard Wagner's opera, Lohengrin. Wagner's wife Cosima recorded in her diaries that Wagner told her that he had written an earlier version of the aria, but lost it. The present aria was an inferior rewrite from the composer's memory. Wagner told his wife that he always mourned the loss of the original version. Remember, those were the days before backup!
6:26 PM May 13, 2011. I notice that Blogger has restored the lost blog posts. I think I'll keep the rewrites and the original posts.