This late 16th century suite of ornamental letters by Giacomo Paolini is known as ‘Grotesque Alphabet in Mythological Landscapes’. The only thing I discovered about Paolini is that he was an Italian artist.
To discover which letters I’ve omitted and which letters were missing from the modern day alphabet, you will need to track them down at the source: the British Museum Prints Database (search on “Giacomo Paolini” in the ‘free text’ field)…
bibliodissey