The Hound's mouth gave another twitch. " You're no more than common thieves" .

" 你们不过一帮土匪蟊贼，还假装什么仁义道德。"

'I won't desert you. I believe that you're a good boy, not a common thief.

“我不会抛弃你的。我相信你是个好孩子，不是个下贱的小偷。

So he is a fraud, a common thief in other words.

【other】所以他是个骗子，也就是说，是个惯偷。

Prison, he said, is no place for a Prince's friend. I am Prince of Wales, and I forbid you to send this man to prison, like a common thief.

他说，监狱不是王子的朋友应该呆的地方，我是王子，我不允许你像对一般的贼一样送他进监狱。