The Trick of the Treasure by Mary Lancaster

Navigating mystery and lies – and their own precarious love.
Struggling with the novelty of their engagement, Constance and Solomon are delighted to dig their teeth into a new mystery – the vanishing of a treasure hoard from a locked strong room.

The treasure, only just brought home by adventurer Barnabas Lloyd, was supposed to pay off his debts and rebuild the family’s finances. Since no one broke into the house, suspicion inevitably falls on Lloyd’s own household – his beautiful wife, his dotty maiden sister, and his spirited children. Or perhaps a friend who is not above a bit of fortune hunting on his own.

But did the treasure, in fact, ever leave the ship? Its disgraced captain and crew have to be investigated, which brings its own complications, especially when one of the crew looks enough like Solomon to be his missing twin brother.