I was reading a pdf of David Astle's book and in the opening few chapters he makes the case that like gold, silver can be manipulated too. What measures would need to be taken to prevent a infiltration of the value, exchange and emission of these certificates?

You say 45,000,000 fractional notes were in circulation, these are fractional notes for te silver one owns, correct?

Like now, most people prefer convenience, so I see little drive towards coin.

The government can do for itself what the banks are willing to do for it.

Any examples today? Are there any governments in the 20th or 21st century that do for itself what the banks are willing to do for it? And what's to say governments do the exact same thing banks are doing. Relying on a credit system.

The government (the independent treasury system) should be its own fiscal agent.

I agree, but a government for the people. There are too many slime balls pretending to represent the people.

banks used the silver certificates as asset upon which to issue their notes. The silver certificates were NOT legal tender, only "receivable for public dues"

That makes perfect sense. I agree with everything you've stated. It is the Hamiltonian empire building that's the problem. Too bad most republicans and democrats, and their trotskyite neoconservative lackeys are neo-Hamiltonians.