Bülow was committed to Wagner's music; in 1858 he had undertaken the preparation of a vocal score for "Tristan und Isolde", and by 1862 he was making a of "Die Meistersinger von Nürnberg". A social relationship developed, and during the summer of 1862 the Bülows stayed with Wagner at the composer's home at Biebrich. Wagner records that Cosima became "transfigured" by his rendering of "Wotan's Farewell" from "Die Walküre". In October 1862, just after Blandine's death, Wagner and Bülow shared conducting duties at a concert in Leipzig; Wagner records that, during a rehearsal, "I felt utterly transported by the sight of Cosima ... she appeared to me as if stepping from another world". In these years Wagner's emotional life was in disarray. He was still married to his first wife, Minna Planer (she was to die in 1866), and was involved in several extramarital relationships. On 28 November 1863 Wagner visited Berlin; while Bülow was rehearsing a concert, Wagner and Cosima took a long cab ride through Berlin and declared their feelings for each other: "with tears and sobs", Wagner later wrote, "we sealed our confession to belong to each other alone".