
On exploring
Google Book Search, I found a Rosemary Sutcliff short story. It's called Flowering Dagger and is in a collection called
Within the Hollow Hills: an anthology of new Celtic writing, edited by John Matthews, published 2000 by Steiner Books. A few sample pages can be found
here. It was originally published in The Real Thing, edited by Peggy Woodford, Bodley Head, 1977. Other contributors include: Robin Williamson, R.J. Stewart, Caitlin Matthews, David Spangler, Peter Vansittart, Henry Treece and Margaret Elphinstone, plus others.
Other books by or mentioning Sutcliff extracted on Google Book Search include:
The Wanderings of Odysseus: The Story of "The Odyssey",
Essential Fiction Genres Student Book by Peter Ellison,
100 More Popular Young Adult Authors: Biographical Sketches and Bibliographies by Bernard A. Drew,
Honey for a Child's Heart: The Imaginative Use of Books in Family Life by Gladys M. Hunt,
Killing the Celt by Tomas Runmhar,
Black Ships Before Troy: the story of the Iliad, etc.