sentences:  Finally his precarious condition obliged him to give up surveying.In 1842 he was employed by the Peninsular and Oriental Steam Navigation Company (P&O), to command their brand new and most luxurious steamer, "Hindostan", on her maiden voyage from Southampton to Calcutta.Subsequently the Hindostan was employed on the Calcutta-Suez run, the Red Sea now made safe by the immaculate surveys led by Elwon and Moresby.