Complex sentence: Merchant bankers in London and Paris financed industrial concerns in the 1850s; most notably Credit Mobilier, founded in 1854 by Jacob and Isaac Pereire, who together with New York based Jay Cooke financed the Transcontinental Railroad.
Split into simpler sentences: Merchant bankers in London and Paris financed industrial concerns in the 1850s. Most notably Credit Mobilier, founded in 1854 by Jacob and Isaac Pereire who together with New York based Jay Cooke financed the Transcontinental Railroad.