While doing research this evening, I came upon some info regarding James and Caroline DeGroft using my public library subscription to HeritageQuest.I am unable to provide a link but the source isKern, J. W., Past and present of Iroquois County, Illinois Chicago:S.J. Clarke Pub. Co.,1907,739pgs.
The information is contained in a short (~1.5 pg) biography of Henry P Webber, Caroline's second husband.While I cannot link you to the source, I can download in .pdf and email to you. If interested, please reply to my email address.