Nostalgic joy - everlasting

The book runs along the familiar lines of the rest of the Famous Five series.
The Five meet someone they do not fully thrust, at least not all of them so they quarrel about that. Uncle Quentin is his own peculiar self and his wife must form a dam of peace between him and the children. Some people play they minor but reliable part: James as a devoted trustee of George, Joanne who provides them with enough food to feed an army.
And there are differences that make this book stand out from the rest and worthwile reading. Like the soup that Aunt Fanny provided for Quentin, Quentin who takes residence on Kirrin Island and the children that must stay at Kirrin Cottage for instance.
As usual some secret passages are discovered, this time a very spectacular one.
The childres are all very polite and obedient to their elders - it stays old-fashioned but can be read with a nostalgic chuckle, it does not disturb or drives attention away from the actual storyline.
Only #6n in a series that has many more books to come. Great!