Gene E. Bloch
I used to think that, and I got annoyed every time I heard it. PartlyI was not a great student but I am pretty sure the "King's lisp" story
is just a legend.
because if the kin couldn't say a z, I would think that he wouldn't be
able to say an s either...
Then I realized that in the day, z and c before e or i were pronounced
ts, i.e., like a German z. So his lisp could have been an inability to
say that sound rather than a plain s sound. And I am no longer annoyed
at people who quote that story.
But truth be told, I still think it's a legend.