John Wall Callcott - Why does beauteous Lina weep? - текст песни (слова)

From "Twilight of the gods" by Thomas James Mathias (1754-1835), lines 61-72  Why does beauteous Lina weep?
 Whence those lorn notes in accent deep?
 A day of war!—prepare, prepare:
 Aloft in distant realms of air,
 Mark the murd'rous monster stalk,
 In printless majesty of walk.
 Odin fearless meets the shock,
 The towers of heaven around him rock;
 Though arm'd in panoply divine,
 He yields, and owns the fated sign;
 To the mansions drear he turns:
 In vain the beauteous Lina mourns.  
Note: "Murd'rous monster" refers to the wolf monster Fenris, who killed Odin and was in turn killed by Odin's son.