As he labored away on his new victim’s very nice belly with the American Eagle, Billy reflected on his fascination with the substance, God’s own canvas.

Skin.

It was Billy’s canvas too and he’d become as fixated on it as the Bone Collector had been on the skeletal system of the body – which Billy had found interesting reading in Serial Cities. He appreciated the Bone Collector’s obsession but frankly he couldn’t understand his fascination with bones. Skin was far and away the more revealing aspect of the human body. Far more central. More important.

What insights did bones give? Nothing. Not like skin.

Of the integumentary organs, which protect the body, skin is the most evolved, far more than hooves, nails, scales, feathers, and the clever, creepy arthropod exoskeletons. In mammals, skin is the largest organ. Even if organs and vessels might be maintained by some alternative Dr Seuss contraption, skin does so much more. It prevents infection and is an early warning system against and protection from excessive cold and heat, from disease or invasion, from ticks to teeth to clubs and, under certain circumstances, even spears and bullets. Skin retains that vitally precious substance, water. It absorbs the light we need and even manufactures vitamin D. How about that?

Skin.

Delicate or tough as, yes, leather. (Around the eyes it’s only a half millimeter thick; on the soles of the feet, five millimeters.)

The epidermis is the top layer, the beige or black or brown sheath we can see, and the dermis, into which a tattoo machine’s needles must penetrate, is below. Skin is a master at regeneration, which means that the most beautiful tattoo in the world will vanish if the needles don’t go deep enough, which would be like painting the Mona Lisa on sand.

But these basic facts about skin, as interesting as they were to Billy Haven, didn’t touch on its true value. Skin reveals, skin explains. Wrinkles report age and childbearing, calluses hint at vocation and hobby, color suggests health. And then there’s pigmentation. A whole other story.

Now Billy Haven sat back and surveyed his work on the parchment of his victim’s skin. Yes, good.

A Billy Mod …

The watch on his right wrist hummed. Five seconds later the second watch, in his pocket, did so too. Sort of a snooze alarm, prescribed by the Modification Commandments.

And not a bad idea. Like most artists, Billy tended to get caught up in his work.

He rose and, with illumination provided by the halogen headlamp strapped to his forehead, walked around the dim space underneath Provence2.

This area was an octagonal chamber, about thirty feet across. Three arches led to three darkened tunnels. In a different century, Billy had learned in research, these corridors had been used to direct cattle to two different underground abattoirs here on the West Side of Manhattan.