In the meantime pearls of small size and of fair luster had been collected in the rivers of Scotland, Ireland, and France, the headwaters of the Danube, and in the countries north thereof. In England, as noted in the preceding chapter, they were obtained by Cæsar’s invading legions, who carried many to Rome. Ancient coins indicate that pearls formed the principal ornament of the simple crowns worn by the early kings of Britain previous to Alfred the Great. The river pearls were not so beautiful as oriental ones; but, owing to the ease with which they were obtained, they were employed more extensively and especially in ecclesiastical decorations, the principal use for pearls from the eighth to the eleventh century. Apparently authentic specimens of fresh-water pearls of an early period are the four now in the coronation spoon of the English regalia, which is attributed to the twelfth century. From the most ancient times until the overthrow of the Roman Empire, practically the only use for pearls was ornamental; but after the eighth century there developed a new employment for these as well as for other gems. Natural history was little studied in Europe from the ninth to the fourteenth century, except for the effect which its subjects had in medicine and magic, which were closely allied. Largely through Arabic influence, the practice of medicine had developed into administering most whimsical remedies, among which gems, and especially pearls, played a prominent part, and belief in the influence of these was as strong as in that of the heavenly bodies. For this application, large demands had arisen for pearls, which seem to have been prescribed for nearly every ill to which the flesh was heir. On account of their cheapness, the small ones—seed-pearls—were used principally; though larger ones were preferred by persons who could afford them. While many of these so-called medicinal pearls were obtained from the Orient, most of them were secured from the home streams in the north of Europe and in the British Isles. After the decadence of Roman power in the East, the rulers of India and Persia, through their control of the fisheries, again accumulated enormous quantities of pearls. All of the early travelers to those countries were astonished at the lavish display of these gems in decorative costume. The manuscript of Renaudot’s two Mohammedans, who visited India and China in the ninth century, notes that the kings of the Indies were rich in ornaments, “yet pearls are what they most esteem, and their value surpasses that of all other jewels; they hoard them up in their treasures with their most precious things. The grandees of the court, the great officers and captains, wear the like jewels in their collars.”[24] [Illustration: FRANCIS I, KING OF FRANCE, 1494–1547 Louvre, Paris ] [Illustration: ISABELLE DE VALOIS By Pantoia de la Cruz, Prado Museum, Madrid ]