Of the fierce wind, while mid-day lightnings prowl
Insidiously, untimely thunders growl;
While trees, dim-seen, in frenzied numbers, tear
The lingering remnant of their yellow hair,
And shivering wolves, surprised with darkness, howl
As if the sun were not. He raised his eye
Soul-smitten; for, that instant, did appear[358]
Large space ('mid dreadful clouds) of purest sky,
An azure disc[359]—shield of Tranquillity;
Invisible, unlooked-for, minister