"I do not understand it, either," he says, a little startled by her admission. "Perhaps..."

His mouth twists.

"The clans often said that resentful energy harms the body and temperament. Yet if it does, I would think thanergy harms the body just as much. It is the energy of death -- of course it would. But." A long sigh. "We both know it is different. I should fine-tune the energy talisman array soon, so I can continue researching how different."

Pushing the pen aside, he rips his sheet of notes free of the portfolio. Wei Wuxian folds them in half and slides them across the table to Harrow.

"Here." Low. "Do with them as you wish. I acted dishonorably in my fear, and I apologize."