The Mystery of the Brass-Bound Trunk (1940)

from the moment nancy drew and his friend are aboard
she saw a man in the pier making a signals with someone on board. she knows about that language but at that time she quit not remember all the sign except the letters that appears on her name and she is quit sure that the man in the pier says BEWARE OF NANCY DREW AND NE the question is who is NE?

from then the mystery got started..

the second mystery was when nancy recieved the wrong trunk.. ( )

When a mysterious trunk is delivered to Nancy's room in place of her own, Nancy can't figure out who it belongs to. She slowly begins to piece together the strange activities of two mysterious men who talk to one another by fingerspelling in sign language. Though Nancy only remembers the letters of the alphabet in her own name, she is able to piece together enough about their activities to determine that they're behind some jewel thefts. The brass-bound trunk itself has quite a treasure- and one that it shouldn't be carrying. ( )

This book was very good! ( )

From the moment Nancy Drew boards and ocean liner leaving for New York, she becomes involved in a new and dangerous mystery. A man on the pier guesters to someone on board in the sign language of the deaf. BEWARE OF NACNY DREW AND NE, he signals. Who is NE? Can it be Nelda Detweiler, a young South African who shares a cabin with Nancy, Bess, and George? When Nancy leans the Nelda has been accused of stealing a diamond bracelet in South Africa, she wonders whether the girl is a thief or the innocent victim of a vicious plot.
Then an unclaimed brass-bound trunk, delivered to Nancy’s cabin by mistake shortly after she embarks, be3comes the first clue that leads her to believe international jewel thieves are aboard. And soon afterwards she realized that her life and the lives of her friends are in danger. Mystery and intrigue follow the girls across the ocean; but with her usual ingenuity; Nancy solves the mystery and defeats her enemies before the shop reaches New York. ( )

Another of my favorites. ( )