There are several photos in the current issue of MONSTER BASH magazine (issue number 29), showing the two Rays (Ray Bradbury and Ray Harryhausen) and Forrest J Ackerman, on Halloween of 1939, wearing the masks that Ray H. created for the three of them. As had been told in the past by these three close friends, they wore them to a showing of the film THE CAT AND THE CANARY to scare others in the theater's audience. The author of the article notes that he received the negatives to the photos from Forry back in 1973. Here is a link to ordering information for the magazine:

http://www.creepyclassics.com/...d=11443&categoryId=3