Just as William did that, he cleared the rings from their content. And now he could see through the leftovers there.
Most of the rings got nothing else except for monster cores and various materials. William didn't care about these cores, as he didn't kill any of these monsters himself. And so, he wouldn't be able to absorb any of them.
Aside from these cores, he found what he was looking for. He got out five scrolls, the same as the one he got before. "So… There isn't just one copy of these scrolls…" he recalled the materials and herbs he found in these five rings specifically, thought about the gold grade sets of gears he found before in them. Linking all together, and it wasn't that hard to guess the identities of the owners of these rings.
They were leaders of their teams. William looked at these five sealed scrolls and felt that he'd not get anything out of them.