It looks to me as if----" He was glancing onwards and checked himself with an exclamation.

His face became grave and set.
"Listen to this," and he read aloud, translating as he went along.
"_Since the tubes have been successful in France, the device should be extended to England.

B45 is obviously suitable for the work.

A submarine will sink letters for the Embassy in Madrid and a parcel of the tubes between the twenty-seventh and the thirtieth of July, within Spanish territorial waters off the Cabo de Cabron.

A green light will be shown in three short flashes from the sea and it should be answered from the shore by a red and a white and two reds._" Hillyard leaned back in his chair.
"B45," he cried in exasperation.