The White People

the long version

"Isobel Muircarrie grows up in the Scottish Highlands where her gift of 'Second Sight' enables her to see the phantom White People and communicate with a ghost child. When she moves to London as an adult and falls in love with a stricken young man, Hector MacNairn, who dies shortly afterwards of a heart attack, her ability enables her to 'see' him as a spirit."- - Description by Peter Haining, in "A Century of Ghost Novels 1900 - 2000" (Appendix to his book, The Mammoth Book of Modern Ghost Stories)