Van Lew used multiple messengers to get her information across.
Explanation:
The main message of the passage is the fact that Van Lew used multiple messengers to get her information across. In this text, this is the idea that is most developed. We learn that Van Lew went to great lengths to ensure that this information was communicated. This included creating a system of couriers, as well as creating credible stories for each one of them. This supports the idea that multiple messengers were necessary in order to get her information across.
