I gather that editors don't edit anymore, but I thought that proof editors proofed. Evidently not. Rivers of London contained a couple of garbled sentences, but nothing like this howler from Jane and the Madness of Lord Byron. A clergyman is speaking:
...it is the death won without glory, the obscure and insignificant ending, that is most valued in the eyes of the Creator. We should not set ourselves up as rivals, I am sure, of that consummate sacrifice at Calgary.
Whether it was Spell Check or the proof reader that didn't know the word 'Calvary' I won't guess, but I observe that Firefox's spell checker does, and insists on a capital c.