A birch tree stood in the center, and around it were the remnants of a circular path lined with stones, and beds of medicinal herbs hedged with bay. The bay was running riot and the herbs were sorely in need of a trimming, but it was clear that this little garden had been more recently tended than the wilderness beyond its walls. An ancient stone birdbath held its share of avian visitors; someone had cleaned and replenished it not long ago. A wooden bench stood under the tree, and on it lay an open book, face down. I froze. But there was nobody in sight; it seemed the reader had tired of study and left this sanctuary.

I put my bundle and writing box on the bench and walked slowly around the path, liking the methodical way the garden had been laid out. Its untidiness did not trouble me; it was only in the practice of my craft that my mind required complete order. This haven had been planted by a skilled herbalist. There was everything here for a wide range of uses, both culinary and medicinal. Belladonna for fever, sorrel for the liver. Figwort, meadowsweet, heart-of-the-earth. And over there . . .

Heart’s blood. In an unobtrusive corner, half hidden beneath the spreading silvery-gray leaves of a gigantic comfrey plant, grew a clump of this rarest of herbs. I’d never seen the real thing before, but I knew it from an illustrated treatise on inks and dyes.

I moved closer, crouching down to examine the leaves—they grew in characteristic groups of five, with neat serrations along each delicate edge—and the stem with its unusual mottled pattern. No buds yet; this rarity bloomed only in autumn, and then briefly. It was the flowers that made it an herb beyond price, for their crushed petals, when mixed in specific proportions with vinegar and oak ash, produced an ink of rich hue, a splendid deep purple favored by kings and princes for their most regal decrees and beloved of bishops for the illustrated capitals in missals and breviaries.The capacity to produce a supply of heart’s blood ink could make a man’s fortune. I brushed my fingers gently against the foliage.