These images come from American photographer and travelogue lecturer Branson DeCou’s visits to Ireland in the early 1930s. He and his wife made lantern slides of them and hand-tinted most of them to garish extremes. He then used these slides in his lectures to the accompaniment of synchronised music. DeCou’s presentations, which he called ‘Dream Pictures,’ were popular and well attended.
Upon the death of his widow, DeCou’s collections passed into the hands of the University or California at Santa Barbara. The images may be accessed here. LINK