Nightfall turned me into a ghost. It had been so hot, I’d dressed in white and hadn’t thought to change into more suitable clothing for a late evening walk. Now my husband was a little unnerved as I appeared to be floating across the field towards him.

With the twilight came the dusk chorus, dark’s answer to the dawn; in the woods, owls hooted and screeched. There was rustling close by, perhaps deer or a badger stirring, as the night woke up.

I’d hoped the day’s heat would be enough to light up the hedgerows, and I wasn’t disappointed. As we started down the track, we spotted the first tiny flicker: a glow worm suspended from a blade of grass. Further along, we found another and another deep within the hedge, fragile greenish-white dots of light.

It’s no wonder folktales abound about faeries. Midsummer Eve, a painting by the English artist Edward Robert Hughes (1851-1914), captures and transforms the charm of these dabs of hedgerow brightness, which cast their own faint shadows.

Of course, in traditional tales, fairy folk or, as they are also known, the Sidhe (‘The Good People’), are much more ambiguous beings than the merry crowd depicted in Hughes’s picture, and best not crossed…

Although neither fairy folk nor indeed worms, glow worms are similarly best left undisturbed in their natural habitats. Their bioluminescence is mainly generated by the female beetle (Lampyris noctiluca) with the aim of attracting a mate. In England, the best time to see them is between June and August – and  those up the lane certainly seem to be more active on balmy nights.

All the same, while they might be firmly of this world, glow worms nevertheless seem to suggest that, on warm summer nights at least, a little magic might just be possible…