Eventually the ground cooled to a point when invisible water vapour in the air condensed into dew drops on the cold surface of the ground.

The ideal conditions are bright sunny mornings after clear, chilly nights, when the ground has cooled down enough for dew drops to form.

The dew drops also need to be plump and round — spiders' webs are ideal because their fine gossamer tends to make dew drops stand up into rounder shapes.

Spiders' webs seem to be festooned everywhere at the moment, lit up in twinkling displays in the early-morning sunshine when dew drops hang off the silky threads like bright pearls.

On the opposite wall, there are fragile dew drops which slither down soft petals.