I don't really like the butchering and stuff but he had some real nice sketches of hangings, some also had a more lifelike style as he experimented. I talked to him a few times on google groups. Great artist and he will be missed.
I've always loved Martin's work Almost every piece is jack-off worthy. But I really like the ones where two dudes torture and kill each other, like the one above of the guys hammering nails into each other's dicks. HOT!