There are quite a lot of oak trees near us, you see, and 'tis the season for deciduous trees to shed their leaves, and oak leaves are apparently particularly good for leafmould. And so: I spent about 90 minutes this afternoon shuttling back and forth between "the allotment" and "a place where I had, on my earlier perambulations, observed Some helpfully pre-bagged Leaves", and the chickenwire I did have staked around the summer squash and their associated beans is now instead staked around... a pile of leaves.
Having achieved proof of concept, I think I am intending to keep half an eye on that spot to see if more Consolidated Piles Of Oak Leaves show up, and then I get to hurry up and wait and decide whether I want to do this again next year.
I also got 38 garlic cloves into the ground, so that job can now be ticked off my list. I look forward to seeing how much it translates to. Though apparently this year I got 32 bulbs, and we have 12 remaining, so maybe I want to go back and stick some more in the ground...