Note 41 — Chapter I
Reading edition
As, for instance, in the case of Taliesin and Ossian, see Squire, Mythology of the British Islands, 318; Rhys, Celtic Mythology, 551; Nutt's Notes to Mabinogion.
I suppose the most ancient example of the duplication process is that of Dion Cassius (iii. 5), who suggests an earlier Romulus and Remus in order to account for the early occupation of the Palatine Hill at Rome. Middleton's Anc. Rome, 45.