Just read a bit - looks like a great book. What Taylor and I call silver soldering, we understand is called silver brazing in the United States. I do not know if the term silver soldering has to have the qualifier of brazing to signify high temperature silver solder.
When we, of the Frozen North, talk of soft silver joints, we say "low-temp silver soldering" and straight silver soldering, ofr us, means high temp.
Dad taught us that good, sliver solder joint ie: a1 mil (1 thousandths) joint would have a tensil strength of 75,000 to 95,000psi, depending on the wire used. I do know the teeth on those huge circular saws used in saw mills have the tungsten teeth merely silver soldered to the round wheel. They get dull, but the solder joints rarely break, no matter what they hit. Silver soldering sights onto a barrel is not normally necessary - low temp silver, or even properly done 50/50 solder is good enough. I used low temp silver for the front ramp on my .458 which lasted for over 14,000 rounds.