I only have the 9th edition of Greener. This statement is found in it but I don't recall just where nor do I know at what point he originally made it.
Dan Lefever also made a very similar statement concerning his guns.
The point is the rotational forces which would tend to open the gun in firing are just not that great. It is really humorous at times when see a maker tout his gun as having great strength because it has triple or quadruple bolts to hold her shut but the only thing they bothered to "Fit" to actually hold the breech to the barrels was the hinge pin. A sturdy hinge pin is normally quite adequate for the job, but one good solid bolt will hold any gun Shut that's ever been built.
