The Clue of the Whistling Bagpipes (Nancy Drew Mystery Stories #41)
Nancy and her friends smiled, and Bess said with a sigh, "I wish we would meet charming characters like that nowadays instead of sheep and jewel thieves!" p.140Nancy travels to Scotland to visit her maternal great grandmother who is apparently Scottish. The things we learn about Nancy! Well, it's nice to see something of her mother's family even if we never hear anything about her actual mother. There are several cases, of course, and one involves smuggling, this time sheep. Why is it always smuggling? It's like there are no other crimes to commit besides smuggling and theft and they are close to the same anyway.
Anyway, mysteries to solve and bagpipes to learn. It is seriously lucky that Nancy is capable of learning any instrument in a few hours and even luckier for her that it happens to be the exact tune her aunt taught her. Otherwise it might have a taken a bit long to catch the thieves. Such a multi-talented girl!