The answer came by return of post, angry, heart-broken, reproachful: how could he be so cold?

回帖来了，愤怒的，心碎的，责备的：他怎么这么冷漠？

You will send a personal demand to me here, and the money, in notes, shall be sent by return of post.

你会在这里向我发送个人请求， 钱会以票据的形式通过回邮寄出。

I mean, if we have nothing on him, I should have thought the same lad would have been in your office by return of post.

我的意思是， 如果我们对他一无所知， 我本以为同一个人会通过回邮进入您的办公室。