Great Northern?

This book from the 1930s or 40s starts with a group of kids sailing in the Hebrides with Uncle Jim -- the uncle of two of them -- at the end of their cruise. They stop to spend a day taking care of the borrowed boat -- cleaning the bottom and putting on a new coat of bottom paint -- and while the older ones are doing this, the younger ones explore. One of them goes birdwatching, and sees something unusual. Sounds pretty dull, right? Wrong. Like all the Ransome (non-fantasy) books, the bad-guy in this book -- an egg-collector -- is completely plausible AND horrible. The multiple story lines are all intriguing. The respect for decent behavior (cleaning the bottom of someone else's boat? Making sure to bury a bit of waxed paper from your sandwich...in 1935??? Respecting property ... not disturbing wildlife ... Passing behind a sailboat when you're in a faster motorboat...) isn't drilled in with a ham-handed holier-than-thou-ness; it's just part of what you get when you read the book. You also get a terrific adventure, a fingernail-biting crisis and denoument (remember when denoument was part of a good story?), humor, character, and a feeling of the Hebrides that you just don't forget. If your kids don't like this book, keep the book and throw the kids in the trash.