The future winter garden, not quite completely dug up.
I've determined that I need a tiller. Not so much to turn the soil up, because it's like concrete back there. I doubt seriously that a tiller would have been able to break it up. Clay really is the very worst soil to with which to work. There is really no good time to try to spade it up- there are just times that are worse than others.
Clay clods. Rock hard clay clods.
However, for the purposes of breaking up clods, mixing in greensand and compost and otherwise improving the tilth, I'm just plain going to need a tiller.
Oh good- something else to research and buy.