It’s fortunate for me that these books are so familiar to me by now, because I got distracted by other books in the middle of this. It’s not my favourite of the bunch, which helps to explain why; I do like the conflicts between Parker and Peter that’re brought out by the nature of the story, the awkwardness between them as Peter has to suspect one of his own friends. That’s perhaps the best part of this: the characterisations of those two as they try to balance friendship and duty; Peter’s struggle with himself and his own honesty.
The ending is one of those awfully convenient, gentlemanly ones where Peter could bring the person to trial, etc, etc, and then warns them and offers them suicide instead. I can never quite decide what I think about those endings: they give Peter a kind of out, so that he doesn’t have to do the ungentlemanly thing. Which is a bit unfair, really.