Here I present lists of the following sources:
Old instruments preserved in museums, with links where possible to online catalogue entries, many of them illustrated.
Old texts, from the 18th and early 19th century, mentioning Spitzharfen. I have transcribed the relevant passages and given a summary paraphrase in English of their contents.
Old pictures, from the 18th century, showing spitzharfen.
Bibliography of scholarly works from the later 19th century on.
Simon Chadwick, St Andrews, Scotland.