LaMort was an individual whose name meant "the Dead".
LaMort wanted to commit suicide after living for centuries on Earth. She wanted something new, something different, but felt that there was nothing new for her on Earth at the end of the 20th century. She planned to take some pills to kill herself.
The Seventh Doctor, Ace and Bernice Summerfield came to LaMort's house in Sydney so the Doctor could talk her out of suicide. LaMort and Bernice were unable to see each other, but could hear each other's voice. The Doctor had Bernice tell LaMort her life story, convincing LaMort that humans would soon expand to many worlds, full of new souls for LaMort. LaMort changed her mind about suicide. (PROSE: Virgin Lands)