Originally Posted by SlytherinSistah

Was approached with a similar question. "Patronus charms, yes." He drew out the card with the books information and location and hit it with a few spells the first of which was a duplicating charm. The little sheet of stiff parchment folded itself in half and flapped both of it's halves until it was airborn and resembled a small thin paper butterfly. "If you would, please follow that parchment. It will show you directly to the section in which you may find a plethora of defense charms, including many on the casting of Patronus charms." He told the students.