These words were like a dagger to the lady's bosom and she resolved to have revenge.

Knowing that Helmichis, a noble Lombard, was in love with one of her maids, she arranged with the young woman, that Helmichis, without being acquainted with the fact, should sleep with her instead of his mistress.

Having effected her design, Rosamond discovered herself to Helmichis, and gave him the choice either of killing Alboin, and taking herself and the kingdom as his reward, or of being put to death as the ravisher of the queen.

Helmichis consented to destroy Alboin; but after the murder, finding they could not occupy the kingdom, and fearful that the Lombards would put them to death for the love they bore to Alboin, they seized the royal treasure, and fled with it to Longinus, at Ravenna, who received them favorably.
During these troubles the emperor Justinus died, and was succeeded by Tiberius, who, occupied in the wars with the Parthians, could not attend to the affairs of Italy; and this seeming to Longinus to present an opportunity, by means of Rosamond and her wealth, of becoming king of the Lombards and of the whole of Italy, he communicated his design to her, persuaded her to destroy Helmichis, and so take him for her husband.

To this end, having prepared poisoned wine, she with her own hand presented it to Helmichis, who complained of thirst as he came from the bath.