Anyone know the answer to this question?

Explanation:

He's trying to get the recipient of the letter to do something. It will only take 1/2 hour of his time. The man is of such a quality that 1/2 hour might free many from bondage, but even if it only frees one that's enough. It's reward enough for his time.

The writer is trying to be lighthearted and amusing, I think. He's not angry and he certainly is not detached and cynical. He means everything he says. He is pleading for his own people.

the nation will get back everything that was lost

hope this

the words "slavery," "devils," and "murderer" evoke a sense of disgust.