Thank you very much for responding, and for your offer of help! I appreciate it so much.
I looked at the Portage Public Library Site this a. m. and could find no obituaries. Looked through some of the 'History of Columbia Co.' material, but could find no mention of him (he only moved there between 1870-1880). Have searched 'Find-A-Grave' & other cemeteries in Columbia Co. with no luck either. Will keep searching, but am so grateful for your offer to look at the courthouse.
Enjoy your remaining time in Florida & have a safe trip home!