These are other images that showcase how Reuben would use different outlets to relieve himself of the stressful aleinating cirrcumstances that he found himself in being overseas. Photographs, art, letters, and the diary entires themselves all acted as a form of escapism for Reuben and many other soldiers during World War I.
This is a photograph contained in Reuben's 7th diary. it was placed in between the cover page and the first page of the diary along with a few other illustrations and notes. The identity of the woman is unknown, but it likely was someone of importance to Reuben. This serves as an example of how soldiers used means such as photographs and letters to remind themselves of their home lives, temporarily transporting themselves away from their placement overseas.
This is a page in Ruben's seventh diary and based on the time, it seems likely that the war is over and Ruben is waiting to go home. The clearest part of the page is where Home is written by the bottom in darker ink and is circled. The circle implies that Ruben was more than ready to go home and missed it very much.
This is a page near the end of Ruben's seventh diary and has the drawing of a ship that has either a Uboat or a torpedo under it. It is possible that Ruben drew the boat based on one that he saw for reference and added the Uboat after the fact as it seems to be less detailed and more sketched in. The other side of the page has math with an unknown purpose, but it is possible that he was tracking the worth or expenses of his paintings, as he was known to do so.