That's very interesting.  I use different signatures for different 
things.  Just my first and last for most things, my first, maiden, and 
last for others.  For genealogy I use my I use my first, middle, maiden, 
and current last names.  But it would never occur to me to sign 
something with an X.  I have always assumed that a person who signed 
with an X was illiterate.  I thought that one who was literate _had_ to 
sign his name.  Am I totally off base here?

Alice Campbell