Thanks, Chris and Boo!
When I first spotted the dogtooth style of brick work I knew I'd end up giving it a try. The first 20 went smoothly but then it did get a bit tiresome. I obviously went off course for one section but either I'll live with it or consider it a personal quirk in the garden.
I saw this idea on Pinterest:
Having this huge surplus of bricks, I then made my own version but I'll relocate it in spring. The not so good news was I had no glass for covering it but I improvised with thick empty plastic mulch bags, anchored with more bricks (as if you couldn't guess!). The baby basil plants did not survive but the lettuce did and is still there. We're due for snow flurries today from 3 PM through the night so we'll see if the lettuce survives. All the fennel seed is about an inch tall and so far, so good!