The next morning, the mysterious encounter in the library was still fresh in my mind. As we gathered for breakfast in the Great Hall, I couldn't shake the feeling that someone—or something—was watching me. I glanced around the room, searching for any sign of the cloaked figure, but everything seemed normal. Harry, Ron, and Hermione were discussing Quidditch enthusiastically, but I found it hard to focus.

"Are you alright, Oliver?" Hermione asked, noticing my distraction.

"Yeah, just didn't sleep well," I lied, not wanting to worry them.

The day's classes went by in a blur. In Charms, Professor Flitwick taught us the Levitation Charm, and Hermione's feather soared gracefully above her desk, earning her yet another praise. Transfiguration involved turning beetles into buttons, which Ron found particularly gruesome. But my mind kept drifting back to the library.

After classes, I decided to take a walk around the castle grounds, hoping some fresh air would clear my thoughts. The weather was crisp, the autumn leaves crunching under my feet as I made my way towards the Black Lake. The serene landscape helped to calm my nerves, and I found a quiet spot near the shore to sit and think.

What had the figure meant about the past and future being delicate threads? How much did they know about me and my knowledge of future events? The implications were troubling. If someone knew my secret, they could potentially use that information against me or worse, alter the course of events in unpredictable ways.

Lost in thought, I didn't notice Harry approaching until he was right beside me.

"Mind if I join you?" he asked, sitting down before I could answer.

"Of course not," I said, grateful for his company.

Harry gazed out over the lake, a thoughtful expression on his face. "You seemed off today. Is everything alright?"

I hesitated. Harry was my friend, and he deserved to know the truth, but I wasn't sure how much to reveal. "I had a strange encounter in the library yesterday," I said slowly. "Someone was watching me. They warned me to be careful."

Harry's eyebrows knit together. "Who was it?"

"I don't know. They were cloaked and vanished before I could get any answers."

He frowned. "That's odd. Maybe we should tell a teacher?"

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"Maybe," I said, though I doubted any teacher would take my concerns seriously without more evidence. "For now, let's just keep an eye out. If we see anything suspicious, we'll report it."

Harry nodded, and we sat in companionable silence for a while, watching the water ripple in the breeze. Despite the uncertainties, I felt a sense of relief having shared my worries with him. We were in this together, and that made the unknown seem a little less daunting.

As we headed back to the castle, we bumped into Hermione and Ron, who were coming from Hagrid's hut. They had brought back a few large pumpkins, presumably for an upcoming Halloween feast.

"Where have you two been?" Ron asked, eyeing us curiously.

"Just taking a walk," I said. "Needed to clear my head."

Hermione looked concerned. "Oliver, if something's bothering you, you can talk to us, you know."

I nodded, touched by their concern. "I know. I will. Thanks, guys."

Back in the common room that evening, I found myself drawn to the library again. Something about the encounter didn't sit right with me, and I felt an inexplicable urge to investigate further. After bidding my friends goodnight, I slipped out of the common room and made my way back to the library.

The castle was eerily quiet at night, the only sounds being the distant hooting of owls and the occasional creak of the old stone walls. I reached the library and quietly slipped inside, the familiar scent of parchment and ink enveloping me. The Restricted Section loomed ahead, dark and foreboding.

Drawing my wand, I cast a Lumos spell, illuminating the rows of ancient books. I walked slowly, scanning the titles and keeping an ear out for any movement. Suddenly, a faint rustling sound caught my attention. I turned towards it, heart pounding, and saw a figure moving swiftly between the shelves.

"Who's there?" I called out, my voice echoing in the silence.

The figure froze, then turned towards me. As they stepped into the light, I recognized the familiar face of Draco Malfoy.

"Malfoy?" I said, lowering my wand slightly in surprise. "What are you doing here?"

He smirked, his usual arrogance in place. "I could ask you the same thing, Evans. Spying on people, are we?"

"I'm not spying," I retorted, trying to keep my voice calm. "I heard someone in here and wanted to see who it was."

"Likely story," Malfoy sneered. "What are you really up to?"

"None of your business," I snapped, feeling my temper rise. "Why are you sneaking around the library at night?"

He shrugged nonchalantly. "Maybe I like a bit of quiet study time. Not that a Gryffindor would understand."

I narrowed my eyes, sensing there was more to his presence here than he was letting on. But before I could press further, the sound of footsteps approached, and we both turned to see Madam Pince, the strict librarian, heading our way.

"What are you two doing here?" she demanded, her eyes flashing with irritation. "The library is closed! Out, both of you!"

Malfoy shot me a triumphant look before slipping away into the shadows. Reluctantly, I followed, feeling frustrated and no closer to answers than before. As I walked back to the Gryffindor Tower, I resolved to keep a closer watch on Malfoy. Something told me he knew more than he was letting on, and I intended to find out what.

For now, though, it seemed my investigation would have to wait. The mysteries of Hogwarts were deep and tangled, and I would need all my wits and caution to navigate them. But with friends by my side and a growing determination, I felt ready to face whatever secrets the castle held.