Fiat justitia, ruat caelum

One of the advantages of the internet is that when you encounter one of those obscure phrases that P. G. Wodehouse scatters about like rose petals at a wedding, you can quickly ascertain the meaning. This particular one is found in the early pages of The Woman in Blue, and means, "Let justice be done though the heavens fall," signifying the belief that justice must be done regardless of the consequences. But you probably knew that already.