1. What are the advantages and disadvantages of trading goods and services rather than using currency? 2. What special skills would a customer or a merchant need to ensure a fair trade? Objective Through the perspective of seventeen-year-old, Lewis Garrard, learners will practice making trades and consider the types of goods and services exchanged at trading posts along the southwestern borderlands in the 1830s. Background INTRO: At about fourteen years of age, Lewis H. Garrard, read John C. Fremont’s Report of the Exploring Expedition to the Rocky Mountains , an account published in U.S. news Duration: 60 Minutes.