This image from the National Library of Ireland's Hogan collection shows a crowd gathered just by the spot where Kevin Barry was captured on September 20 1920. The exact date on which the photo was taken is unknown, but it could have been snapped several months later, some time in in 1921. 

Loughrey faced specific challenges when working on a crowd scene.  "Crowd images are particular, in that ambient light falls in odd places," he says. "Crowds and groups present a maze of shadows and highlights that you must work through progressively and section by section. Also, in this case, the depth of field falls off the further back you move through the image making the foreground gathering have a harder shadow. It's slight, but details like these must be observed during colouring." 

Original image courtesy of the National Library of Ireland