I’m trying something to see if it works out: embedding a manuscript from the Llyfrgell Genedlaethol Cymru, or National Library of Wales. The work is the notebook of John Harries (c. 1785-1839), a cunning man of Cwrty-Cadno, Carmarthenshire.
Most of the book consists of materials taken from elsewhere, but the first treatise is a handwritten version of the Goetia which seems to include some seals not present elsewhere. I offer it for your appreciation – just don’t ask me to pronounce any of the Welsh words above.
https://viewer.library.wales/build/lib/embed.js/* wordpress fix */
Update: No luck with the embed, so just try this link.