debian-legal wanted to check with you whether it was drawn entirely from scratch, or whether it made use of any pre-existing clip art in the 'swirl' design. If it was drawn from scratch, whether you'd ever licensed anyone else to use it other than Debian. And if it wasn't all from scratch, if you could possibly remember what sources you used. This is in order to clear up some potential legal issues relating to use of the 'swirl'.