one o'clock
The parade is on the top of the rock , beneath which vast cisterns have been constructed , which will contain a three years ' supply of water . In addition to these , a well , four hundred feet deep , cut in the rock , communicates with the Rhine , which is to be used only on an emergency , as the river water is unwholesome . The river seen from the parade is very beautiful , but the company were obliged to hasten back to Coblenz , in order to dine in season for the afternoon steamer to Cologne . At one o'clock the voyage down the Rhine was renewed , and the students , after their long ramble in the forenoon , were glad to use the camp stools on the deck of the steamer . Village after village was passed , but the scenery was less grand than that seen the day before . There were fewer castles to be seen on the heights , though Dr. Winstock could hardly tell the story of one before another required attention . The railroads which extend along each side of the river , in several instances , passed under castles , towers , and ruins , whose foundations have been tunnelled for the purpose .