With all due respect, Katarina Walker was wrong in some spots;
I am not one to criticize a pioneer, to whom I am deeply indebted.
Her book is an introductory text. She fully intended to progress with
a second volume, when her life, sadly, drew to an untimely conclusion.

There exists a tiny coterie of A.P.'s whose dogged work on Spanish21
far exceeds the seminal work of the inestimableMs.Walker, but does
NOT address Pontoon, as that game is not found outside of Down Under.