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Page 23. " the sea-maiden of the Hebrides "

Possibly a reference to The Sea-Maiden, a Scottish fairy tale collected by John Francis Campbell, which first appeared in 1862 in Popular Tales of the West Highlands.

Alternatively, this may be a reference to the mermaid that is said to have been sighted off the coast of Benbecula (Gaelic: Beinn nam Fadhla), an island in the Outer Hebrides, in 1830. It is said that she was killed by a local boy and buried on the island.