This letter P icon is by Supratim Nayak:

http://hydrattz.deviantart.com/

http://www.iconarchive.com/artist/hydrattz.html

Downloaded from:

http://www.iconarchive.com/show/multipurpose-alphabet-icons-by-hydrattz/Letter-P-blue-icon.html

According to IconArchive.com at 1:41 EST 2/19/2013:

"License: Free for non-commercial use."