I googled that title and guess what I found!
http://www.medirabbit.com/Books/hare_about_house.PDF
Shortly before we found the leverets, we had found a shallow 'rabbit hole' that had appeared overnight in the pea patch. It wasn't very deep and the boys poured a can of water down it to discourage the rabbits from moving in. Two days later the hole mysteriously filled itself in, and a few days later we found the leverets a few metres away.
My husband has just told me that an identical hole has just appeared in another pea patch. I have the strange feeling that I've been here before...
I'd better get that pond dug asap so they'll all move out of my garden!