I’ve finally made a how-to on the Tennis Racketar that I made all those years ago, I’ve put it all up on Instructables for your viewing/learning pleasures.
I did another video too, although the playing skills are really no different!
Instructable on the Tennis Racketar
Vulpestruments 
A century ago, the participation of women in sports was limited to only a few sports and there was an unfortunate social stigma against female athletes before that.