What secret code is spoken in Number the Stars? Name all of the secret code statements, questions, or exclamations.

Shortly before Annemarie, Ellen, her sister, and her mother left for Uncle Henrik's farm, she heard her father on the telephone.  He was talking to Uncle Henrik, but their conversation seemed strange.  

First, her father asked Uncle Henrik if the weather was "good for fishing."  After listening for Uncle Henrik's response on the other end of the line, her father stated that the rest of his family would be visiting.  He also mentioned that they would be bringing "a carton of cigarettes" to him.  He said that there were a lot of cigarettes in Copenhagen.  Annemarie found this odd, because cigarettes were almost never available since the war started.  Referring again to the cigarettes, her father added to Uncle Henrik that "'there [would] be others coming to you as well.'"  

Annemarie was suspicious of this strange conversation.  Then she realized that her father was speaking in code.  He was really talking about Ellen.  Ellen was the cigarette.