The chapters on theft and trespass establish the rights of book owners as against book stealers, book borrowers, and book defacers, with an affectionate precision which would have gladdened the heart of Charles Lamb or Sir Walter Scott.

["A, being on friendly terms with Z, goes into Z's library, in Z's absence, and takes a book without Z's express consent.

Here, it is probable that A may have conceived that he had Z's implied consent to use Z's books.

If this was A's impression, A has not committed theft." "A takes up a book belonging to Z, and reads it, not having any right over the book, and not having the consent of any person entitled to authorise A so to do.

A trespasses.
"A, being exasperated at a passage in a book which is lying on the counter of Z, snatches it up, and tears it to pieces.