The mystery of the queen's jewels

It's the Alden children's first trip to London, and it seems that someone is following them. Then Benny and Henry's room is ransacked and a beautiful broach with the initials HRH is found in Benny's backpack.

Main Author: Warner, Gertrude Chandler, 1890-1979.
Other Authors: Tang, Charles.
Format: Books Print Book
Language: English
Published: Morton Grove, IL : Albert Whitman & Company, 1998.
Series: Boxcar children special ; 11.
Subjects:
Summary: It's the Alden children's first trip to London, and it seems that someone is following them. Then Benny and Henry's room is ransacked and a beautiful broach with the initials HRH is found in Benny's backpack.
Physical Description: 121 pages
ISBN: 9780807554517
0807554510
Author Notes: Gertrude Chandler Warner grew up in Putnam, Connecticut. She wrote The Boxcar Children because she had always dreamed about what it would be like to live in a caboose or a freight car--just as the Aldens do. When readers asked for more adventures, Warner wrote more books--a total of nineteen in all. After her death, other authors have continued to write stories about Henry, Jessie, Violet, and Benny Alden, and today The Boxcar ChildrenĀ® series has more than one hundred books.