Sometimes identifying an image involves more than just analyzing clothing and hairstyle: You must recognize what type of image you have, and date the enclosure — frame, mat or case — in which you found it. But don't worry: Even a novice photo detective can decipher this evidence by researching the answers to three key questions. To illustrate the process for identifying "cased" images, I'll use this mystery photo, which Carole Dolisi Bean discovered in her great-grandmother Elizabeth Moll Dolisi's sewing box.

What type of photo is it?