According to what Shard heard from the coachman, "common knowledge" dictated that underground cemetery plots were the most expensive, and among the ground-level plots, those beneath trees were slightly pricier. Being buried under a tree symbolized a noble character in literary works.
The sound of cicadas filled the air, and as the weather was a bit gloomy, the sunlight that reached the ground was very dim, as if it were about to rain. Yet, even such feeble sunlight caused the two spirits to become increasingly faint.
Just as the Outlander's hometown rumors had it, spirits could not be exposed to sunlight for too long. Of course, evil spirits born from Relics or other formidable evil powers had strong resistance to sunlight.