Another test, which was supposed to be convincing to skeptics, was one in which a double slate was used; it was hinged and provided with a lock in the wooden frame. The slates were examined, locked, and the key given to the skeptic. The skeptic was allowed to select from a number of pieces of colored chalk the color that he desired the message to be written in. Upon the slates being unlocked and opened, the writing is found in the color selected. While the slates are being examined, the medium seizes a duplicate key which fits the lock. (Fig. 14.) This key has a thimble attached to it which fits the performer’s right thumb; also attached lengthwise to the key are several small colored pencils or crayons of different lengths. When the slate has been examined, it is placed under the top of the table and held in position by the thumb of the right hand, which is underneath, and the fingers above the table. During this manipulation the thimble is placed on the thumb, and the performer, with the key attached to it, opens the slate, using his knee to assist or support the slate. One part of the slate opens downward and rests on the knee, which holds it in position, i. e., at an incline, pressing it against the table top. On this part of the slate the writing is now done with the colored crayon selected, which are usually red, blue, green and white. When the color of the crayon is selected the performer turns the thimble around, bringing that color upward. Although not easy to execute, it is, nevertheless, a most surprising and effective test. The above test was used by a medium very successfully for years in England and France, and was found out recently.