The poem
Once a dream did weave a shade, O'er my Angel-guarded bed. That an Emmet lost it's way Where on grass methought I lay.
Troubled wildered and forlorn Dark benighted travel-worn, Over many a tangled spray, All heart-broke I heard her say.
O my children! do they cry, Do they hear their father sigh. Now they look abroad to see, Now return and weep for me.
Pitying I dropp'd a tear; But I saw a glow-worm near: Who replied. What wailing wight Calls the watchman of the night.
I am set to light the ground, While the beetle goes his round: Follow now the beetles hum, Little wanderer hie thee home.
Answer: It's an ant - you learn something new every day!