British Goblins: Welsh Folk-lore, Fairy Mythology, Legends and Traditions: A study by Wirt Sikes (1881), e-text from the Internet Sacred Text Archive.
Celtic Folklore - Welsh & Manx: By John Rhys (1901); e-text at the Internet Sacred Text Archive.
Pais Dinogad: Text and translation of one of the earliest surviving Welsh nursery rhymes.
V Wales - Folklore: Online texts of "The Mabinogion", W. Jenkyn Thomas' 1907 "Welsh Fairy Stories", and the complete works of Marie Trevelyan.