Ah! At this, and perhaps surprisingly, Norrell brightens. It is not, after all, the same thing as wishing to overturn his law -- it is defining it properly, and if there is something thing Norrell greatly enjoys it is discussing magic. Definitions especially.

"Oh! Do you believe there are some spells that should be re-categorised? That is possible! There are some things that can be cast in more than one way, or perhaps adjusted -- a great many spells can be updated, and perhaps cleaner versions introduced. I have thought of publishing a book of magic myself for the modern age, suggestions and so on, but I have so little time..."

That, and Norrell struggles to put his thoughts to paper. Oh, how he would love to publish more! Yet the truth of it is he is his own worst critic, and struggles with the wording and style and exactly what he wishes to say. Which, unfortunately, are things required for one to write a book.