Memory Aid for Sandpainting, circa 1940-1950Memory Aid for Navajo sandpainting by Roger Hathale, circa 1940 1950. Navajo medicine men used memory aids like this one as visual guides for creating sand paintings during healing ceremonies. These aids ensured that every detail of the sandpaintings, which were rich with symbolism, could be reproduced with accuracy and care. Pigments on cloth. Presented in a new custom frame with UV70 protectant glass.