Slow start and more of a drawing room farce than a mystery but still enjoyable. ( )

Most of this is agreeable, as I expect of the Merrivale stories, but the solution depends on a witness looking right at something and not seeing it, and I find that incredible. I fully accept that eye-witnesses can be unreliable, but that is normally under crisis conditions which do not apply here. ( )

A lot of talking with little mystery. ( )

The last in the series, and one of the best and funniest. ( )