Some Goods Links on the above Subject
http://www.mudgala.com/articles /grantha.html
http://www.ancientscripts.com /grantha.html
http://dsal.uchicago.edu /digbooks/digpager.html?BOOKID =PK419.V468_1983&object=1
http://www.ambaa.org/pdf/index .html
en.wikipedia.org/wiki/Grantha_script
http://www.mudgala.com/articles
http://www.ancientscripts.com
http://dsal.uchicago.edu
http://www.ambaa.org/pdf/index
en.wikipedia.org/wiki/Grantha_script