"Whatever found a new home in the mansion," Grandpa had concluded, "was something from this preserve. Even if it escaped from the poisoned bog, it should not have the power to create a plague like we're witnessing. An advantage to the treaty is that we know what creatures are here. We have them catalogued."
"How could any creature have remained in the mansion after Midsummer Eve?" Tanu had inquired. "The culprit should have been forced to return to its proper dwelling once the night ended."
"Theoretically any of them could remain if they managed to change the register, which appears to be what happened," Grandpa had explained. "The register is used to alter certain boundaries and grant access. Patton Burgess managed to tear the treaty from the register and escape with those essential pages. Otherwise the preserve might have fallen. The treaty now resides in the current register. But the damage done to the old manor was irreparable."
So the whirlwind wasn't the answer. The demons weren't the answer. None of the creatures at Fablehaven were apparently the answer. And yet the plague was happening. They had eventually decided to sleep on it, leaving the problem unresolved. The only decisive action taken all day was when Grandpa used the register to prohibit all fairies from entering the yard.
Seth wandered to the window to gaze out at the purple evening, and jumped back when he saw a black figure silhouetted against the glowing sky. Seth jostled against the nearby telescope, embracing the expensive piece of equipment before it could topple. Then Seth turned back to the window, half expecting the figure to be gone.
The figure remained, crouching, not a silhouette-a human-shaped, three-dimensional shadow. The shadowman waved at Seth. Hesitant, Seth waved back.
The shadowman shook his fists as if excited, then motioned for Seth to open the window. Seth shook his head. The shadowman pointed at himself, then pointed into the room, then once again pantomimed opening the window.
Seth had gotten into major trouble the previous summer for letting a creature into the house by opening that same attic window. The creature had been disguised as a baby, but turned out to be a goblin, and once inside, the treacherous intruder had let other monstrosities in. Before the night was over, Grandpa had been kidnapped, and Dale had been temporarily turned to lead. Seth had learned his lesson. This year, he had stayed in bed on Midsummer Eve. Peeking out the window had hardly been a temptation.
Of course, Midsummer Eve was different from most days, being a night when the boundaries of Fablehaven were dissolved and all sorts of nightmarish monsters could come into the yard. But today was ordinary. On a regular evening, dangerous creatures should not have access to the yard in order to crouch outside Seth's window. Did that mean the shadowman was a friendly creature?
Then again, nice creatures had become menacing lately. Maybe this shadowman had once been able to enter the yard, and now that he was evil, he was using that status to trick Seth! Or maybe this was whoever had started the plague! The thought made Seth shiver. It had a ring of truth to it-the inky black figure looked like a likely candidate for starting a plague that replaced light with darkness.
Seth tugged the curtains shut and backed away from the window. What should he do? He had to tell somebody!
Seth clomped down the attic steps and raced to his grandparents' room. The door was shut, so he banged on it.
"Come in," Grandpa invited.
Seth opened the door. Neither Grandpa or Grandma had changed into their nightclothes yet. "There's something outside my window," Seth whispered hastily.
"What do you mean?" Grandpa asked.
"A shadowman. A living shadow in the shape of a man. He wanted me to let him in. What creatures can enter the yard besides fairies?"
"Hugo and Mendigo," Grandma said. "And of course the brownies live under the yard and have access to the house. Anything else, Stan?"
"Everything else is by invitation only," Grandpa said. "I've let satyrs into the yard on occasion."
"What if this shadow guy started the plague?" Seth speculated. "A creature we didn't know was on the preserve, some shadowy enemy who can come into the yard but not the house."
Grandpa scowled thoughtfully. "The yard has fail safes to prevent most creatures, even surprise guests, from entering. Whatever the nature of this shadowman, not all of the rules seem to apply."
"At least it couldn't enter the house," Grandma said.
Grandpa started toward the door. "We had better fetch Tanu and Dale."
Seth followed Grandma and Grandpa as they collected Tanu and Dale and explained the situation. They mounted the steps to the attic in a line, Grandpa in front, Seth at the rear. Moving the telescope out of the way, they gathered around the curtained window, Grandma with her crossbow, Tanu holding a potion ready.
Grandpa pulled aside the curtains to reveal an empty stretch of roof barely visible in the dying twilight. Seth pushed his way forward to the glass, peering in all directions. The shadowman was gone.
"He was here," Seth promised.
"I believe you," Grandpa said.
"He really was," Seth maintained.
They waited, watching as Grandpa shone a flashlight through the slightly warped panes. They located no sign of an intruder. Grandpa clicked off the flashlight.
"Keep the window closed tonight," Tanu admonished. "If he returns, come for me. If not, I'll search the roof in the morning."
Tanu, Dale, and Grandpa left the room. Grandma waited at the top of the stairs. "You'll be all right?"
"I'm not scared," Seth said. "I just hoped I'd found something useful."
"You probably have. Keep that window shut."
"I will."
"Good night, dear. You did the right thing to come and tell us."
"'Night."
Grandma left.
Seth changed into his pajamas and flopped onto his bed. He began to suspect that the shadowman had returned, perching outside the window. The fiend had probably not wanted the others to see him. But now if Seth peeked, he would be there, silently asking to enter.
Unable to banish the suspicion, Seth went to the window and threw aside the curtain. The shadowman had not returned.
The next morning, Tanu crept around on the roof outside the window but found no trace of a visitor. Seth was unsurprised. Since when did shadows leave footprints?
At breakfast, Grandpa tried to inform Seth he would be restricted to the house all day. After Seth's persistent complaining, Grandpa agreed to let him play with Mendigo in the yard if somebody supervised them from the deck.