Clerk Colvill, ignoring the advice of his lady or his mother, goes to a body of water, where a mermaid seduces him.
Francis James Child regarded the ballad as incomplete, and that Clerk Colvill is not an innocent victim of jealousy, but has clearly had a relationship with the mermaid, so that she inflicts death as the penalty for his infidelity, a motif found in many German and Scandinavian tales.
[3] The detail of the mermaid washing a sark or silk garment may descend from Scandinavian originals of an elf-woman offering a shirt to the man she is enamored with as a sign of betrothal (see §Similar ballads below).
The ballad is called "Elveskud" (DgF 47) in Danish, "Olav Liljekrans" (NMB 36) in Norwegian, "Herr Olof och älvorna" (SMB 29) in Swedish, "Ólavur Riddararós og álvamoy" (CCF 154) in Faroese and "Kvæði af Ólafi liljurós" (IFkv 1) in Icelandic.
[11] A piece of garment offered as gift is a form or seduction, or more precisely an invitation to become betrothed, and this is in Scottish tradition preserved in ballads, as well as being attested in the Scandinavian ballad Elveskud (DgF 47), where Sir Olav (Olaf) is offered a shirt in such a manner.