It was so fun to read this post. I believe I corresponded with you years ago. I've been quite ill the last several years and haven't been able to pursue our ancestry interests. I'm happy to be doing better and enjoying the research again!
Samuel and Isabella Atchison are my 2nd great grandparents. My maternal grandfather, Clarence Walker, was the only child of William Henry and Elizabeth (Hunter) Atchison,my 1st great grandparents. Apparantly Clarence and "Lizzie" left North Dakota with William Henry to Canada shortly after his birth in December of 1899. They're found in the 1900 census residing in Foster County. In 1902 Clarence and Elizabeth left Canada (sometime in 1901) when Grandpa was a year old. The story that's been passed down was that they walked back to Stutsman County to be near her family. She married Frank Walker in 1902 and gave birth to their first child that same year. Grandpa ended up taking the name Walker, although it's doubtful that he was formally adopted. The story goes that he left home at 13 years old to work and live on the Abledinger Farm. I'm not sure if he graduated from high school or if his education ended at that time. He's found in the household of the Abledingers in the 1920 census.
Grandpa Walker was notified of Henry's death in 1950 and an inheritance. He either didn't want, or didn't have the means, to travel to Canada to claim his inheritance.
I'd love to learn more about the Atchison-Armstrong connection. My husband and I could be distant cousins!