"On the subject discussed earlier, in our last exchange -
We no longer have need for those captives. What you do with those poor bastards is none of my concern. If you do go with your wicked plans, please make sure you leave no one talking about the studies performed. No witnesses, so to speak.
Cruelty is not unheard of in times of war. I'm sure you if anyone should know this. But some things exceed the limits any human should ever experience. We do not want word going around. Take no insult in my words, but for my own sake too, I hope I never hear from you again.