There was nothing for it but to scale it, and as I was in the act of clambering up I was startled by a strange voice behind me—a woman's voice raising an alarm!

Ray, who was standing behind me, closed with the unwelcome stranger in an instant, and placed his hand forcibly over her mouth while I sprang back to assist him. That moment was an exciting one.

"Put your handkerchief in her mouth, man!" he cried. "Don't you see who it is—the woman Stolberg!"

Quick as thought I took out my handkerchief and stuffed it into her mouth while he held her. Then I gripped her arms, while Ray produced the thin silk rope which he usually carried on such expeditions and with it bound her tightly hand and foot.

She struggled violently, cursing us in German the while, but all in vain. So at length we disposed of her comfortably against a tree-trunk in a field opposite, to which Ray very deftly secured her. She had evidently driven over from Cromer on some important errand to her friends and had stopped the cart some distance away from the house.

Cautiously we negotiated the high iron gate, and creeping noiselessly across the lawn, gained the window on the left of the entrance. Ray flashed his light upon it, and noting that the fastening was only an ordinary one, promptly commenced work upon it by inserting one of his burglarious tools between the sashes. In a few moments it sprang back with a click, and lifting the sash slowly and pushing aside the holland blind, he swung himself into a comfortably furnished sitting-room, I following quickly at his heels.

In that dead silence I could hear my heart throbbing.

We were actually in the house of the spies!

The room, which contained nothing of interest to us, smelt strongly of tobacco, while upon the table lay a big German pipe. Still gripping his leather bag Ray carefully opened the door, and crossing the wide old-fashioned hall, opened another door, when we found ourselves in an old-fashioned dining-room, the sideboard of which was decorated with some very nice antique blue china. From this apartment we visited the drawing-room and another smaller reception-room, and then, creeping on tiptoe, we ascended the old well staircase which once creaked horribly beneath me.

Here we were confronted with a serious problem. We knew not in which room the spies were sleeping.