https://searcharchives.bl.uk/?f%5Broot_ancestor_reference_ssi%5D%5B%5D=Add%20Ch%2019788-22613&sort=hierarchy
Archive Reference (shelfmark): Add Ch 19788-22613 - British Library Archives and Manuscripts...
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https://rism.online/sources/400227556
Minuets–D major; Manuscript copy; CH-Ca [without shelfmark]
RISM Online is a global search platform for musical sources, helping users discover manuscripts and prints held in libraries worldwide.
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https://searcharchives.bl.uk/?f%5Broot_ancestor_reference_ssi%5D%5B%5D=Add+MS+89094&sort=relevance
Archive Reference (shelfmark): Add MS 89094 - British Library Archives and Manuscripts Catalogue...
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