Well, it took exactly 2 weeks but I finished our new herb spiral!!!
I worked an average of about 3 hours per day for 14 days. It was a very, very hard project, and a major improvement to our zone 1 environment. I'm pleased with my work and thrilled with the decision to do it.
Having made it with brick and mortar, I am confident that this is a garden that will last for decades (unless we get rid of it before then.)
I just finished it a few hours ago, so some of the mortar is still a bit "wet" which is why you may notice some odd colors. They'll even out by tomorrow.
I've never done brickwork before so this was also a learning experience for me. I'm satisfied with my work.
Next step is the fun part - building the soil! I will, of course, be going the hugelkultur route on this. I'll give the mortar a few days to cure before proceeding.