I think this is one of Wentworth's best, and it definitely retains a solid 5 stars on rereading. However, if you are looking for a 'whodunnit' that keeps you guessing up to the last page, this is not the book for you. The murder victim is mentioned in the blurb on the back cover, but even if she wasn't, it would be obvious, as she is the kind of character you love to hate. The pool of suspects is extremely limited, and the motive is also obvious. So it doesn't get those five stars for the complexity of the plot! Why do I rate it so highly then?
One of the things I love about this book is the way in which Wentworth tackles difficult relationships. In addition to the murder victim, Mrs Graham, who is abusive and controlling toward her daughter, we have two abusive marriages. Many novels of the era include female characters who are victims of abuse, but it is much more unusual to find a portrayal of an abused husband, and what is yet more unusual is that he is portrayed so sympathetically instead of being blamed for 'allowing it'. I also appreciated the way Wentworth is not afraid to make Mrs Graham a really horrible and self-centred person who has no love at all toward her daughter - there is so much sugary sentiment over mother-daughter relationships that it is refreshing to encounter a writer who isn't afraid to point out that sometimes, a mother can be incredibly destructive and harmful toward her children.
I also really liked the main couple, Nicholas Carey and Althea Graham. Very unusually for Wentworth, they have known each other since their schooldays and gradually moved from friendship to love. They are both strong characters, and I like the way in which Nicholas respects Althea as an equal instead of ordering her around as so many of Wentworth's so-called heroes do.
We also see a lot of Wentworth's mischievous sense of humour in this book. Mrs Graham, who is constantly hoping to be taken for much younger than she is, "had been moving the date of her marriage back for years. Beyond sixteen she was unfortunately not able to go, and the trouble was that Althea looked her age and more." At one point, she shows uncharacteristic and surprising concern toward Althea, encouraging her to spend some money on improving her appearance. But we soon find out that it is because "no one is going to believe you are under forty yourself if you have a daughter who might be thirty-five."!!!
When Frank, referring to Miss Silver's endless knitting comments "what a lot of dressing up the human young require" Miss Silver, eyeing Frank's own elaborate and expensive outfit comments "Not , I think, only the very young, my dear Frank."
We have some amusing minor characters too, including the three Misses Pimm, who live to gather and broadcast gossip, and who are busy trying to work out a way of finding out more about the murder when Miss Silver visits them, "It would perhaps be unkind to compare Mabel's feelings with those of a wolf who, having laid elaborate plans to attack the sheepfold is gratified by the voluntary approach of one of its choicer lambs..."
The Gazebo shows just how good Wentworth can be when she really tries. I'll definitely be reading this one again.