Miss Mary Morstan has a strange story to tell. Since her father disappeared, she has received a large pearl through the post on the same day, every year for six years. Who is sending them? And what about her father´s paper with the words "The Sign oof Four" written on it? Holmes alone can solve these mysteries. Čítanka z edície Dominoes, úroveň 3 (B1), 1000 kľúčových slov. Audio nahrávka textu na stiahnutie. anglický text