They had determined to walk from the sun-dial to the Abbey wall and back again.

So far the garden, though mysterious, showed no signs of anything supernatural.

They began to pluck up courage, and even to talk to one another in low whispers.

At the ruins they turned and looked back towards the sun-dial.

The moonlight streamed along the flagged path, and shimmered on the clumps of early yellow lilies.
What was that, stealing from under the shelter of the hawthorn tree?
The girls gasped and almost stopped breathing.
[Illustration: A TALL FIGURE, CLOTHED IN SOME WHITE GARMENT, WAS GLIDING TOWARDS THEM.] A tall figure, clothed in some long white garment, was gliding towards them.