A Piper on the Hob is a house cricket. During the colder nights the presence of a cricket was said to be a sign of good luck. Confusingly, there is another musically unrelated Irish jig of the same name (see the last link below).
Ref: https://tunearch.org/wiki/Annotation:Pipe_on_the_Hob_(2)
Ref: https://thesession.org/tunes/81
Ref: https://thesession.org/tunes/1049
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