I left the rabbits unattended for an hour or two and Tolkien graduated to the big wide world by way of of a tunnel he'd dug under the gate.
Unless he returns of his own choice it's very unlikely I'll see him again. The grass is waist high in the fields and he could be within five feet of me and I'd not see him. By now he's almost certainly met his wild cousins- who have many burrows in the area he escaped into. He might even be underground.
How long does it take a rabbit to dig a rabbit hole? I found a new one within a stone's throw of the rabbit shed- out in the open among the roots of a tree.