Impressive shading and details for watercolours. The proportions are right too =P
As a picture it's a bit dark - which I put down to the very dark frame - though I do guess it does fit the poem. It was once upon a midnight dreary if I recall correctly. The composition is good though her hair is kinda all over the place. Like she has two different hairstyles, one for the left and one for the right side so to say.
For some reason the thumbnail closeup of the candles looks like an adventurer on a cliff over the sea at sunset to me. Maybe that's jsut me though - probably.