"A new Book of Cyphers" ... about Intertwined Initials

I came across a book, William Parsons' A new Book of Cyphers (1704)(Google) during a web search. For a moment, I expected it was about an invention of a cryptographic method, as in Samuel Morland's A New Method of Cryptography (1666), which I descrbied in "Samuel Morland's "New Method" Used for Charles II's Ambassadors". 

Actually, the "cipher" of this book refers to a symbol design made of intertwined initials. 

Such "ciphers" (or chiffres in French) are quite common and I mentioned them in "Great Ciphers of Napoleon's Grande Armée" (in the context of Empress Marie-Louise), "ウイリアム・ブレア「暗号」（1807）（『リース百科事典』）" (quoting from a definition of "cipher", "a kind of enigmatical character, composed of several letters interwoven together, fancifully" from Rees' Cylopaedia), and possibly others. Searching for "elizabeth cipher" (without quotes) on Google gives a Wikipedia page "Royal cypher" before my article about Elizabethan codes and ciphers.