Mystery Solved

There is a tree we go past on the way to the river, which has a hard green fruit and we had no idea what it might be - didn't seem to be getting any softer as they ripened. Well, our guests today knew - Keith had seen them in Greece... Jan whipped out her penknife, peeled it; Mike found a stone to smash the shell, and lo! moist, creamy walnuts - quite different to dried out ones - you can see them in the extra.