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Preparations

The keelboat used for the first year of the journey was built near Pittsburgh, Pennsylvania, in the summer of 1803, to Lewis's specifications, and was completed on August 31. The vessel was immediately loaded with equipment and provisions. While in Pittsburgh, Lewis bought a Newfoundland dog, Seaman, to accompany them. Newfoundlands are amicable, large working dogs and good swimmers, lovers of water and commonly found on fishing boats, as they can assist in water rescues. Seaman proved a valuable member of the party, aiding with hunting and protection from bears and other potential predators. He was the only animal to complete the entire trip.