dark rainbow drawing II

This is the first drawing that I made for almost a year, and is not a new drawing, but instead represents a visit to an earlier work, now 'finished' in July 2010. The drawing dates from 2008, and was originally untitled, one of the rainbow drawings made whilst living in Turnpike Cottage, shortly after return from hospital in the late Autumn.
On regarding it with a critical and not altogether friendly eye several weeks ago, the notion of obscuring the bow with crumbled, dark pastel suggested itself to me, a possible development that could have meant the ruination of a drawing. Instead, the drawing has been revised, I think successfully, and I can look upon it with something of the feeling of relief.