as a rapid courier service between the East and the West, from St. Joseph Missouri to Sacramento, California. There were tens of thousands of people living and working in California that wanted news of what was happening in the East and who wanted to send letters and packages to friends, family members, and business partners living back east. But you may wonder: why did all those people move so far away from their friends and families back east in the first place? Why were they in California? Let's learn the answers in this exciting book!

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