The next day, I left my gloves in my bag and met Bob's buddies and their two mean-as-hell rat terriers on the banks of the Yazoo around noon. In four johnboats, we ran upriver for nearly an hour and a half, then began drifting downstream to check the spawning boxes strung along the banks. Bob had built the 4-foot cavities himself and sunk them with mud--sometimes 15 feet below the surface--at designated spots in the river. Each was tied to a tree or a stump with heavy cable. In really deep spots, grabblers could use the cable to pull themselves to the bottom.