Analysis of Doubt No More That Oberon

Doubt no more that Oberon--
Never doubt that Pan
Lived, and played a reed, and ran
After nymphs in a dark forest,
In the merry, credulous days,--
Lived, and led a fairy band
Over the indulgent land!
Ah, for in this dourest, sorest
Age man's eye has looked upon,
Death to fauns and death to fays,
Still the dog-wood dares to raise--
Healthy tree, with trunk and root--
Ivory bowls that bear no fruit,
And the starlings and the jays--
Birds that cannot even sing--
Dare to come again in spring!