Draco often took these walks - it was freezing, and there was not likely to be too many people in his way as he walked, which he appreciated more and more as he waited for Snape's prediction to come to pass.
Often, he found himself at the lake. No one thought any longer of the squid, which was a bit disappointing. They'd spent weeks up in arms about it, and then let the idea slip away. Not that it much surprised him, really.
As he looked out over the frozen water, however, it became obvious he wasn't the only one who'd wanted their time alone, today.