Of course the rules have probably been revised since Thomas Shauff? drew up the bit I quoted 75 years ago .

A 'royal pair' is the same as in poker - 4 of a kind.

I guess the rules you quoted are the same as I played under - maybe there is no difference between US and UK now?

Ive played on and off for over 20 years and never saw the 5 card running flush for it to be an issue

Someone put us out of our misery and work out how you score 23 please.