Final answer:
The passages do not provide information about how Sal's mother traveled to Lewiston, Idaho.
Step-by-step explanation:
Based on the given information, it is not clear how Sal's mother traveled to Lewiston, Idaho. There is no specific mention of her mode of transportation in the provided excerpts. The passages mainly focus on different stories and experiences, such as the immigrant journey, search for missing persons, and the challenges faced by individuals in different situations.
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