Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Valentine "Val" Walker (1890 - 1969) was an English magician, escape artist and illusion designer. Born in Mosely, Birmingham, he served in the navy and was billed as the "Wizard of the Navy". Walker is credited as the designer of the Radium Girl illusion. He is also said to have been the designer of the John Bull Straitjacket, which was created for a challenge to Houdini in 1926.