On exploring Google Book Search a while back, bloggers and Rosemary Sutcliff fans Sandra Garside-Neville and Sarah Cuthbertson posted that they had:

…  found a Rosemary Sutcliff short story that was new to me. 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.

via Rosemary Sutcliff: an appreciation: November 2006