Old Plain, the, [66].

Old Sarum, [29], [386].

Olwen, [340], [341], [343], [345], [353].

Onagh, queen of the Irish fairies, [243], [244].

Origins of English History, Mr. Elton’s, [6], [8], [25], [26], [70], [228], [327], [413].

Orkneys, [386];

King Lot of Orkney, [359].

Oscar, son of Ossian, [208], [212], [217], [222], [246], [315].

Osla Big-Knife, [352], [353].

Ossian, MacPherson’s, [203].