Today it was the William Boyd Park Story, set in Green Park. If you have not read the story and don't want it spoiled, stop here.
The story includes a new nomenclature for breezes and winds to replace the unromantic Beaufort Scale. I couldn't make my mind up as to whether this was a Valentin (leaves rustle) or a Modeste (branches shift).
By three o'clock it was definitely the latter.