Asleep
as if my trade
Dickinson ran her father's household after her mother's illness—domestic work was literally her trade. But 'bone' suggests death's profession, not housework.
children to the rainbow's scarf
Children can't actually reach a rainbow no matter how close it looks. The comparison measures impossible distance, not nearness.
eyelids in the sepulchre
Dead eyes can't see sunset. This is the poem's turn—all those 'as far from' comparisons now apply to a corpse.
How still the dancer
First mention of a person. The entire poem has been describing this dancer's stillness through negatives—what she can't feel or do.