§ Of the Rings of Power and the Third Age The Silmarillion

Orcs were mustering, and far to the east and the south the wild peoples were arming. Then in the midst of gathering fear and the rumour of war the foreboding of Elrond was proved true, and the One Ring was indeed found again, by a chance more strange than even Mithrandir had foreseen; and it was hidden from Curunír and from Sauron. For it had been taken from Anduin long ere they sought for it, being found by one of the small fisher-folk that dwelt by the River, ere the Kings failed in Condor; and by its finder it was brought beyond search into dark hiding under the roots of the mountains. There it dwelt, until even in the year of the assault upon Dol Guldur it was found again, by a wayfarer, fleeing into the depths of the earth from the pursuit of the Orcs, and passed into a far distant country, even to the land of the Periannath, the Little People, the Halflings, who dwelt in the west of Eriador. And ere that day they had been held of small account by Elves and by Men, and neither Sauron nor any of the Wise save Mithrandir had in all their counsels given thought to them.