Lys Symonette now relocated to West Germany where Randolph Symonette appeared in various major opera houses, focusing on some of the large-voice Wagner roles. Initially he spoke absolutely no German and his new wife had to coach him phonetically for his roles. During the 1953/54 season Lys was able to return with her husband to Mainz where he appeared at the recently reopened Staatstheater. During their time living in West Germany she also promoted Weill's later works in that country "through ingenious translations and ceaseless proselytizing". Return to New York Ten years later the couple returned to New York City. Over the next few years Randolph made a number of further appearances at the Metropolitan Opera. Lys appeared with Weill's widow, Lotte Lenya at the Theatre de Lys, accompanying the singer in Gene Frankel's production, Brecht on Brecht. Over the next couple of decades she worked closely with Lenya as accompanist, trusted musical advisor and, at least on matters touching Kurt Weill's artistic legacy, friend and mentor. She persuaded Lenya to allow her to hand over a fat pile of unpublished Kurt Weill songs to Teresa Stratas which led to the publication of numerous songs that otherwise would have been lost to posterity including, most notably, "Youkali". In 1968 the Symonettes relocated to Tallahassee where Randolph had accepted a teaching job – later a professorship – at Florida State University. Two years after that she was drawn back to New York in order to be at the side of Lotte Lenya during preparations for an English-language premiere of Weill's "Aufstieg und Fall der Stadt Mahagonny" ("Rise and Fall of the City of Mahagonny"). Preparation of the opera had been dogged by artistic and legal disagreement, and Symonette reprised her role as "musical representative" of Lotte Lenya for rehearsals and performances. In the end credit for the translation of the libretto was shared between Lys Symonette and the poet Arnold Weinstein. As the 1970s progressed the amount of time spent supporting Lotte Lenya increased. Additionally, in 1974 Lys Symonette returned to the Curtis Institute, now as a voice coach. During the decade she collaborated on several new Weill productions and engaged in other projects which involved the publication and, frequently, the performance of hitherto unknown Kurt Weill songs. Later years and the Kurt Weill Foundation Lotte Lenya died of cancer on 27 November 1981. She had been ill for several years,