These pages are from the Macclesfield Alphabet Book, essentially a 16th century design studio's marketing portfolio. The British Library is hoping to buy the book from its current owner, at a price of £600,000. From the CR Blog:
Produced c1500, the book is filled with designs for different styles of script, letters, initials and decorative borders. All are believed to have come from one workshop, where the book would have been used not just in ye olde pitche meetinge but also to teach assistants how to reproduce the house styles.