Where does the Hung Gar come from?

Criticaldog wanted some more activity, so here's a question.

The Hyung crane over cloud is very obviously derived from WFH Hung Gar, and the Dan Gum is clearly a form of Wu Dip Do, a weapon that is not seen anywhere else in Asia except in southern China. So where does it come from? I find it highly unlikely one of WFH's students went to Korea before 1910, so it's somewhat confusing.