I do not have anything specifically for E. O. CURBOW however I have a suggestion and that is that you might want to search in what was Indian Territory until late 1907 in now
OKLAHOMA censuses....alot of
Logan County families came here into
Leflore County, OK. (Poteau is county seat)about that time.) And the name is spelled differently here, or
KERBOW. They were here in the early censuses and there are a few still here only females so I don't know their married names, other than one person who married a
KERBOW (he is now deceased) but she is at least 71 so may be able to help you. My email addy is
okiegrlgg@aol.com if you wish to pursue this, I can give you her married name now.
Hope this may lead you to the right persons.
Glynda
Ellman