So, Bill Ward was actually playing timbales on Children of the Grave. This is the most enduring Black Sabbath album for me. The production is extremely good: Tony was trying a lot of new things, and I’m very pleased with the drumming. I was pulling off a lot of new things that I’d been trying to do for three years, such as my double bass work in Children Of The Grave. There’s a lot of different bass drum movement, and I play the timbale with my left hand on that song too.
I’ve always just just assumed he’s able to make tom toms somehow sound like kettle drums.