Cader Idris at Sunset

Last autumn, as we sat, ere fall of night,
Over against old Cader's rugged face,
We mark'd the sunset from its secret place
Salute him with a fair and sudden light.
Flame-hued he rose, and vast, without a speck
Of life upon his flush'd and lonely side;
A double rainbow o'er him bent, to deck
What was so bright before, thrice glorified!
How oft, when pacing o'er those inland plains,
I see that rosy rock of Northern Wales
Come up before me! then its lustre wanes,
And all the frith and intermediate vales
Are darken'd, while our little group remains
Half-glad, half-tearful, as the vision pales!