On the following evening, as soon as tea was over, the two friends slipped off down into the playground, where they were joined a minute later by Acton, who, unlocking the shed, took down from the peg on which it hung the key of the door in the outer wall.
"You'll have plenty of time," he said, glancing at his watch, "and with this moonlight you'll soon be able to see if they're about. I'll keep the door, and let you in when you come back."
The next moment the two members of the Alliance were trotting down Locker's Lane. It was a bright, frosty night, and the hard ground rang beneath their feet like stone. They turned off on to the grass, lest the noise should give the enemy warning of their approach; and when within about a hundred yards of Horace House, pulled up to consider for a moment what their plan of action should be, before proceeding any further.
"I don't see any one," said Jack Vance.
"Perhaps they are hiding," answered Diggory. "Look here! let's get into this field and run down on the other side of the hedge until we get opposite the gate."
The stronghold of the Philistines was silent as the grave. The two chums crouched behind a thick bush, and peering through its leafless branches could see nothing but the closed double doors, and a stretch of blank wall on either side.
"There's no one about," whispered Vance; "I don't believe old Noaks has told them."
"Wait a minute," answered Diggory. "I'll see if I can stir any of them;" and so saying, he knelt up, and cried in an audible voice, "Now, then, are you all ready?"
Diggory and Jack Vance dropped flat on their stomachs, for the words had hardly been uttered when the doors were flung open, and at least ten of the Philistines rushed out into the road with a yell of defiance. Many of them were bigger than Acton, and what would have been the fate of the two Birchites had they kept to the road instead of acting on Diggory's suggestion of advancing under cover of the hedge, one hardly dares to imagine.
"Hullo!" cried young Noaks, who had headed the sortie. "There's nobody here, and yet I'll swear I heard them somewhere."