I think this is the gem of the set. It is exquisite in its harmonies, which are neither too acerbic nor overly lush, and in its understated phrases which are full of implication. Nothing here is gratuitously plopped in to fill time. It is my habit, every time Neil posts a set, to make a CD so I can listen several times at leisure through the hi-fi. The experience is invariably worth the trouble. Purely personally, I would place this piece together with the "March to School", in a very high category of improvisation.
Of course the stated image has been done to death by dozens of composers, famous and obscure. Some are a sight more effective than others and I have to say that, for what the comparison is worth, this has just as much of significance and beauty to say on the matter as works such as Bridge's "Dusk".