And the amount of fingerprints has only increased exponentially since then. My understanding is that they have many buildings full of them now, and the civillian and military prints have been separated. The prints were all classified in those days and filed using "The Henry System," which was a a very involved formula for classification. Nowadays fingerprints are classified using the NCIC method with 2 letters or a 2 digit number for each print. I was trained classification and how to search for prints but it has been too many years ago now to remember all of it. I did the darkroom work making all the enlargements for court testimony etc.