Mr. Bean visits a rare book library (possibly the British Library), where he reads a rare tome that must be handled with gloves. Soon after he uses a pencil and a crayon to copy a page of the book by shading on a piece of tracing paper, he sneezes, and the tracing paper slips away. He doesn't notice this, and continues to use a crayon for shading, but on the book instead of the tracing paper. When he notices this, he attempts to remedy the situation but only makes the matters worse. His final solution is to swap his book with that of someone else at his table and he almost gets away with it. (thetvdb.com)