“…Philadelphia merchants oversaw the debarkation, the collection of passengers' outstanding debts, and the preparation of the vessel for its next destination. 8 The industry grew quickly in the 1730s when more and more would-be emigrants began to take the opportunity of passage on credit. In this system, the migrant became indebted to the merchant to a sum equal to the travel cost, plus 20 percent, and had the debt 'redeemed' by friends, family.…”