How does the author use foreshadowing in The Persian Pickle Club?

In Chapter One, Dallas provides two key pieces of foreshadowing that can be found in the closing section and refer clearly to the book's primary theme, the importance of friendship. Queenie's comments foreshadow the development of several new friendships, including that between Queenie and Rita, and suggests the depth and power of old ones, specifically those between the women of the Persian Pickle Club. This, in turn, relates to Queenie's second comment about being unable to "keep [her] mouth shut," itself a manifestation of one of the book's secondary themes of the keeping of secrets.