Badische Hauptbahn
Financial difficulties led to a series of mergers and increased foreign investment in the rail companies. French investment in Switzerland was also stimulated by an interest in Alpine crossings. Many of the original companies merged with the Swiss Northeastern Railway (German: "Schweizerische Nordostbahn") and with the United Swiss Railways (German: "Vereinigte Schweizerbahnen", VSB) in the east and with the Jura–Simplon Railway (French: "Compagnie du Jura–Simplon", JS) in the west. Despite the financial difficulties, by 1860 a continuous line extended from Geneva to Lake Constance, and by 1870 other main routes were completed. Steamers connected to the railways across several major lakes: Geneva, Neuchâtel, Thun, Lucerne, and Constance. Connections to the networks of neighboring countries occurred at Romanshorn (by ferries to Lindau and Friedrichshafen), at Basel by rail to the Baden Mainline and to the French Chemins de fer de l'Est, at Schaffhausen to the Baden Mainline and at Les Verrières to the line to Pontarlier and Paris.