Caterpillar with no name

On a tour of the garden this morning I found loads of these caterpillars munching thier way through my Solomon's Seal plant. This one was a very tidy eater. I think they must be moth caterpillars of some sort. I looked through all my butterfly and moth books, and searched the web, but the nearest I found could not be identified. See if you agree that this is the same as mine.