ENDescription
I believe the various mentions in the journal of an Elder Olsen (Olesson, Olsson, etc) Are to James Alfred Olsen. His Family Search ID is KWVG-M28. We find William celebrating with others Elder Olsen's birthday on August 6, 1901. The Family Search record places his birthday on July 30, a reasonable timeframe to celebrate a birthday. William references Elder Olsen by A. M. Oleson. It is possible that he is referencing multiple Elder Olsens but I can find no other Olsens in the mission that fit the timeframe at this point. Elder Olsen would have been 19 at the time of his call.
Given that William is a phonetic speller I wonder about the accent that Elder Olsen may have had. Did the way he pronounce his own name cause the spelling issues in William's journal?
See also: https://history.lds.org/missionary/individual/james-alfred-olsen-1880?lang=eng
Related Subjects
The graph displays the other subjects mentioned on the same pages as the subject "Elder James Alfred Olsen". If the same subject occurs on a page with "Elder James Alfred Olsen" more than once, it appears closer to "Elder James Alfred Olsen" on the graph, and is colored in a darker shade. The closer a subject is to the center, the more "related" the subjects are.