This chapter shows how, through Saint-Simonianism, Emile and Isaac Pereire found their vocation as railway entrepreneurs. It was at the Salle d'Athenee in the autumn that Isaac Pereire gave his four 'Lessons on Industry and Finance' which the Globe printed late in 1831. Isaac Pereire's 'Lessons' show how thoroughly he had mastered complex ideas to paint a broad picture of contemporary society and a vision for its future. As Emile Pereire was preparing to quit the Saint-Simonian movement, Isaac was ordering its uniform: a pair of grey trousers, a pair of blue trousers, and a 'blue costume of the 2nd degree', the whole costing 137 francs. In an article in the Globe, Isaac Pereire immediately addressed the 'Mediterranean system' in the wider context of a languishing and depressed French industrial base, a manufacturing sector crushed by foreign competition.