So glad to have connected with you! This is great! I have photos of Ben, his brother Barney, Hattie, Florence, and their Father Fred, and their mother Hilgien. Also have many photos and information of decendents.
My understanding is there were two children that died in infancy, one of which must have been Harm and Tobias as you outlined.
With the new information you sent, I was able to find a 1940 censis (I think you reference it below) on Ancestry.com which solved a mystery I have been trying to figure out. Hilgien is also known as Helen. Now I know where my grandmother got her name (Helen)!
Ben Fred Hector was my great grandfather and was married to Jennie Lamfers. Their children were Ben, Jr., Helen, and Gladys.
Looking forward to sharing additional info. You may send info to email@example.com