Mud squelched beneath his feet, leaving boot prints as he slowly walked toward the occupant.

Mud squelched under his boots.

Mud spattered their trousers and squelched underfoot.

Mud sucked and squelched under the hooves of the horses.

Mud squelched behind Gregory.

Mud covered his trousers, squelched from his wet shoes, and dripped with the trickling rainwater down one whole sleeve where he'd caught himself from a nasty fall, that last time through.

Mud squelched over his shoes and impeded his progress like some quagmire trying to prevent the rejoining of that body with its head.

Mud squelched and smooched underfoot.