Well, let's see. He's about the average size of a cat--a little bigger than Snowdrop, perhaps, and if I can convince her to come out I'll gladly show you--and all black, and he usually has rather ragged ears.

[The accuracy of the description could be chalked up to the fact that she's seen him that way so many times...or perhaps it's just that she's paid very close attention to his appearance. The world may never know. >>]