During his career in librarianship, Naudé helped instruct collectors and libraries in the selection and acquisition of their titles and how to create catalogs for their libraries. He was a major proponent of scouring secondhand bookshops and print shops for valuable and hard to find literary works. “When Naudé has been in town, the booksellers' shops seem devastated as by a whirlwind. Having bought up in every last one of them all the books, whether in manuscript or in print, dealing in any language whatever with any subject or division of learning no matter what, he has left the stores stripped and bare.”