Thank you for the interesting reading. First time I have seen this.
Those photos showing two variations of the "English" lock, sometimes referred to as a Jacobean lock, although I don't recall why this reference.
The larger photo shows the retaining piece (the proper name escapes me at the moment) between the frizzen screw and the frizzen spring. This feature is also on Mark's lock.
The smaller photo shows one piece being used as both a frizzen spring and a hammer stop. Appears to be an attempt at simplification. Interesting.
I find these early transistion type locks very interesting. It's obvious there was alot of lock experimentation between about 1600-1670 from the wheellock to the French style flintlock.