Riley: [examining the back of the Declaration] So if this things in invisible ink, how do we look at it?
Patrick Gates: Throw it in the oven.
Abigail, Ben: NO!
Patrick Gates: Throw it in the oven.
Abigail, Ben: NO!
Riley : [examining the back of the Declaration] So if this things in invisible ink, how do we look at it?
Patrick Gates : Throw it in the oven.
Abigail , Ben : NO!
http://www.moviequotedb.com/movies/national-treasure/quote_16424.html