This paper examines two tenth-century woodblock prints from Dunhuang acquired by Sir Aurel Stein. They are registered under the numbers Ch.00151 and Ch.00152 at the British Museum. The first, Ch.00151, is dedicated to Avalokiteśvara and the second, Ch.00152, to Amitābha, both with magical formulas written in Siddham characters in square or circular fashion around the central image of the respective deity. Editions, translations and identifications of the texts are presented along with a study of the Chinese inscriptions on the side of the xylographs. It is shown that these two objects were apparently produced to serve as amulets.