He put a hand above his eyes and squinted. “What gold thing?”

“On the tower there. Right below the top window opening.”

Eddie looked again and then dropped his hand. “I don’t see anything.”

I beckoned Ms. Terwilliger over and tried to show her. “Do you see that? Below that window on the tallest tower?”

“It looks golden,” she said promptly.

Eddie was incredulous and turned back to where we indicated. “What are you guys talking about? There’s nothing there.” I could understand his disbelief. Dhampir vision was superior to that of a human.

Ms. Terwilliger scrutinized him for a moment before fixing her gaze back on the tower. “It’s possible we’re looking at something that can only be seen by those who perceive magic. This could be what we need.”

“Then how do we get to it?” I wondered aloud. The tower itself was little more than a high stone wall, and I wasn’t confident it offered great footholds for climbing. It was also in a section of the castle behind a fence, warning visitors to stay on the outside. With a few more tourists wandering through, plus the occasional park ranger, I knew there was no way we could covertly jump the fence.

Eddie surprised us both with a magical suggestion. “I could climb it. Can’t you guys do an invisibility spell?”

“Yes . . .” I began. “But it won’t do much good if you can’t see what you’re looking for. I wish I could climb it . . . but I think it’s a bit beyond my abilities.”

“Can we both be invisible?” he asked. “You stand at the bottom and spot me. Tell me where to go.”

Ms. Terwilliger turned Eddie invisible, and I then cast the same spell on myself. It wasn’t a particularly strong invisibility spell, and anyone looking for us would be able to detect us. We didn’t want to cast a stronger spell, in case we had to defend ourselves later, and we were taking it on faith no tourist or ranger was expecting to find someone climbing the ruin walls.

Unseen, Eddie and I easily hopped the fence and approached the tower in question. Up close, I now had a better sense for what the golden object was. “It looks like a brick,” I told him.

He followed my gaze, still unable to see what I saw. “I’ll take your word for it.”

The tower’s surface was rough and irregular, with erratic handholds and other openings left behind for long-gone windows. I wouldn’t have been able to climb it, but Eddie managed it deftly, the strong muscles in his body working as he grappled for places to rest feet and hands as he slowly made his way up. When he arrived at the top window, he at least had a place to rest and stand on the opening’s edge. Reaching up, he placed his hand on a brick at random. “Now what?”

“It’s three bricks to your left and two up,” I called.

He counted and moved his hand, setting it on what I saw as a golden brick. “Is this it? It’s loose. I can pull it out.”

“That’s the one.”

I tensed as he pried the brick from the wall. I sensed no obvious traps from this distance, but for all I knew the entire structure would crumble down around us when he removed it. With a little wriggling, it came free. Both Eddie and I froze, waiting for a deadly fotiana swarm or some other disaster. When nothing happened, he tossed the brick to the ground beside me and began scaling his way down. Once he was safely back, we hurried out of the enclosed area and took the brick to Ms. Terwilliger.

All three of us crowded around it, hoping for revelation—but got nothing. We cast more spells on it and tried pairing it with the original brick we’d brought from Pittsburgh. Still nothing. Wondering if there might be more gold bricks around, we did another search of the property but came up empty. Hot and hungry by this point, we decided to call a break and get some lunch. We went to a German restaurant and were surprised to see how crowded it and other restaurants in the park’s small town were.

“There’s a fishing convention in town,” our waiter told us. “Hope you’ve got a hotel if you were planning on staying.”

We hadn’t gotten one yet, actually, though we had been discussing staying overnight to possibly search the park again tomorrow. “Maybe we can find another nearby town,” I mused.

The waiter brightened. “My uncle runs a campground that has vacancies right now. He’ll even rent tents and everything. Cheaper than a hotel.”

Cost wasn’t an issue, but after a brief discussion, we decided to follow up on the offer and go out to the campground, simply because of its proximity to the park. We were able to rent what we needed, get set up, and then make another trip to Ha Ha Tonka before it closed for the night. Once more, we found no answers in either the park or the brick. We tried to tell ourselves that morning would bring fresh perspective, but none of us would give voice to the burning question hanging between us: What were we going to do if we weren’t able to find the gold brick’s secrets?

I longed to discuss it with Adrian, but there’d still been no communication since my last update. Dutifully, I sent him another report about what was going on and then prepared for bed, unwilling to admit how much his radio silence bothered me. Exhausted from a long day, I soon fell asleep in the rented tent . . .

. . . and was awakened a few hours later by a panicked Eddie.

“Sydney! Jackie! Get up!”

I opened my eyes and instantly sat upright. “What? What is it?”

He was standing in the unzipped opening of the tent, pointing outward. Ms. Terwilliger and I scrambled to his side and looked where he indicated. There, out in the moonlight, a glowing puddle of what seemed like molten gold was oozing over the ground, coming toward us. Where it touched, it left scorched grass and earth behind.