Another complicated mystery, with multiple strands that are mixed up together. There's tension between the town and university, with riots in Cambridge. The atmosphere isn't helped by the drainage ditch being dredged. Out of the slime, an ambitious college principle dredges a relic of a local martyr. And that's only the start. You do worry that Bartholomew is far to easily lured from college on a mercy mission and promptly attacked, it seems to have happened in each book so far. But he and Brother Michael are an engaging detectives and not being blessed with amaxing intellect does make him more human than a lot of fictional detectives. Intriguing and, as it's been a while since I've read this one, I had no idea what the solution was!