§ Of the Sindar The Silmarillion

Of the long years of peace that followed after the coming of Denethor there is little tale. In those days, it is said, Daeron the Minstrel, chief loremaster of the kingdom of Thingol, devised his Runes; and the Naugrim that came to Thingol learned them, and were well-pleased with the device, esteeming Daeron's skill higher than did the Sindar, his own people. By the Naugrim the Cirth were taken east over the mountains and passed into the knowledge of many peoples; but they were little used by the Sindar for the keeping of records, until the days of the War, and much that was held in memory perished in the ruins of Doriath. But of bliss and glad life there is little to be said, before it ends; as works fair and wonderful, while still they endure for eyes to see, are their own record, and only when they are in peril or broken for ever do they pass into song.