See commons:User:Davepape/Images by others#King Albert's Book for those already uploaded
Was this registered in the US? All PD-US-1923-abroad at least
Commons
- Resurgam, Frank Dicksee, PD-old-70
- Louvain Cathedral, W. L. Bruckman (Willem Leendert Bruckman d. 1928, PD-old-70
- Aid for the Fallen, Thomas Brock, PD-old-70
- Charleroi, Joseph Pennell, PD-old-70
- A Study, Harrison Fisher, PD-old-70
Here
- Queen Mary, John Lavery, PD-old-70 in 2012
- Unconquerable, Arthur Rackham, PD-old-70 in 2020
- Untitled, Edmund Dulac, PD-old-70 in 2024
- The Gloomy Thick Wood, Kay Nielsen, PD-old-70 in 2028
- Dies Irae, Maxfield Parrish, PD-old-70 in 2037
- Sympathy, James Montgomery Flagg, PD-old-70 in 2031
- La Belgique: 1914, Bernard Partridge, PD-old-70 in 2016
- The Death of Admiral Blake, A. D. McCormick Arthur David McCormick) d. 1943, PD-old-70 in 2014
- Sketch, Leonard Raven-Hill, PD-old-70 in 2013
- The Belgian of Tomorrow, William Nicholson, PD-old-70 in 2020
Maybe Commons, if not here
- On the Field of Honour, Howard Chandler Christy, check publication history