So-o, it’s taken six weeks (very comparable with Section 2, as it happens) but Section 4 (of the second half of the WALL finale — remembering my “diptych” account here) is now a wrap.

So now tis onward, onward (‘game is afoot’ — with all due respect, & apologies, to the great Sherlock) to Part 5 — of 6 overall, as advised here.

You may also recall, from my post on completing Section 3, that I proposed looking at Sections 4 and 5 together. I had notions of maybe collapsing them into one section,...