Ebenezer Cobham Brewer,
Character Sketches of Romance, Fiction and the Drama…
“ She fell in love with duke Grondibert, whose wounds she assisted her father to heal. Birtha, "in love unpractised and unread," is the beau-ideal of innocence and purity of mind. Grondibert had just plighted his love to her when he was summoned to court, for king Aribert had proclaimed him his successor and future son-in-law. Gondibert assured Birtha he would remain true to her, and gave her an emerald ring which he told her would lose its lustre if he proved untrue. ”
