After Shackleton left with the James Caird, Wild took command of the Elephant Island party, some of whom were in a low state, physically or mentally: Lewis Rickinson had suffered a suspected heart attack; Perce Blackborow was unable to walk, due to frostbitten feet; Hubert Hudson was depressed.[98] The priority for the party was a permanent shelter against the rapidly approaching southern winter. On the suggestion of Marston and Lionel Greenstreet, a hut—nicknamed the "Snuggery"—was improvised by upturning the two boats and placing them on low stone walls, to provide around five feet (1.5 m) of headroom. By means of canvas and other materials the structure was made into a crude but effective shelter.[99]