I have long been disappointed that I have not seen any pictures or film of Ueshiba Sensei taking a fall and practicing ukemi. I had come to the conclusion that it was not much part of his practice. Finally I found a film, and took a still of it, of Ueshiba taking a fall for a boy practicing with him. I am still not convinced he took a lot of ukemi in his later years, but at least we see him doing it once.
Here is the film it came from. This still was taken at 7:13 in the video.