Since her father disappeared ten years ago, Mary has received annually and anonymously a pearl. When she is finally requested to meet the sender she is accompanied by Holmes and Watson. The stranger relates to them a tale of secrecy, hidden treasure and sudden death. Product details Audio CD Publisher: BBC Audiobooks Ltd (7 May 2002) Language: English ISBN-10: 0563536705 ISBN-13: 978-0563536703 Product Dimensions: 14.5 x 1 x 16.1 cm