[MMouse]: isaac's tattoo

[Robert Perry]

here's a silly question that has sorta bugged be for awhile.
anyone know what the tattoo is on isaac's arm?
madflower has a photo of it but you can't make it out (thanks for the photos
and your effort, madflower).
robert
http://www.underworld.net/~madflowr/mouse/
p.s. it's the photo titled isaacsing