The middle lettering is in French, reads "Leal Souvenir" (Loyal Memory) and indicates that the portrait is commemorative, completed after the man's death.
Stephen Deuchar, director of the Art Fund charity, said Leggatt wanted to commission the portrait in memory of his old friend, the art collector and philanthropist Sir Denis Mahon, whose collection the charity manages.
"That said, I have no doubt it is in memory of Edith Cavell, given the likeness of the portrait".
The portrait of Miller, made posthumously from memory, if not from supernatural experience, is a striking example.
The portrait, beautiful and discomfiting, is like a memory of what we never knew.
She rehung the portrait, and kept the watch and her memories close at hand.
For Rothman Case, the boozy artist of "Old Providence," the Caribbean is a memory kept alive by the portraits he painted of an exotic woman who won his heart.
These portraits so often seem to invoke death, perhaps because the portrait served a function like that of the family itself: preserving memory against death's familiar onslaught.
Works represent every period of Dalí's career, with painting highlights including "The Average Bureaucrat" (1930), "The Disintegration of the Persistence of Memory" (1952-54) and "Portrait of My Dead Brother" (1963).
The portrait of Paul Acquaviva presented during the preview at the New York Marriott Downtown included photographs, recorded memories by family and friends, and biographical material.
