1920-1924, 2006, and undated
The collection is first organized by format into identified and then unidentified images, a postcard and copper engraving plates, and scanned images on discs. Identified images are filed by envelope number in numerical order. Next are unidentified images without envelope numbers which are filed by negative number. Lastly, unidentified images without either an envelope or negative number and filed by folder number. In 2006, Clarke staff scanned the negatives producing positive prints and discs of the images, which are found in Box 11 at the end of the collection.