Your John B. Swearingen was listed on the 1885 Jasper Co. Elk Creek Twsp.census age 32 farmer,born in W.V., wife Matilda age 27,born in Jasper Co.IA.,children were Hattie A. age 3, born in Jasper Co.IA.and Rachel E. age 1 also born in Jasper Co IA.
John B. Swearingen and Matilda Dearinger married May 1,1880.
On this 1885 census they lived in the same twsp. as Leonard Swearingen,his wife Selencia and their 7 children.
Hope this helps!