On 17 August 1915 Sir Ernest Shackleton's ship "Endurance", trapped in the ice like "Deutschland" three years earlier, drifted to a point 10 miles west of Morrell's charted position. Here, a depth sounding recorded 1,676 fathoms (10,060 feet, 3,065 m), leading Shackleton to write: "I decided that Morrell Land must be added to the long list of Antarctic islands and continental coasts that have resolved themselves into icebergs". On a further sounding of 1,900 fathoms (11,400 feet, 3,500 m) gave Shackleton additional evidence of the non-existence of New South Greenland.