Bartimaeus and Natti

A scene from the book The Amulet of Samarkand, one of the Bartimaeus Trilogy (I highly reccomend reading these books as they are well-writen and witty, especially if you like magic). Bun anyway, about this scene: Bartimaeus has taken Ptolemy's form and is dumping Nathaniel in the Thames to get all the crud off of him, and of course Natti didn't ask the djini to do this and is fighting and spluttering, but Bartimaeus just thinks he's asking to be washed again.