Looking into the past, the Cameraist - James Powell's incredible project

Richard asked in the comments how the addresses were found for the old photos, in order to find the current location to do these cool double images... Jason replied in the comments that the landmarks are fairly well known to him, as he has lived in DC a long time. I want to add to that this info, the photos are from Shorpy.com, and it's a great website I've browsed for years and reposted many images here, and in the numerous comments after each photo that Shorpy posts you can usually find the address, and the cross street, and more trivia about the items in the photos.

Found on http://jasonepowell.com/ via http://stipistop.com/