I hope you are still out there. D Tifft is my great-great-grandfather, and has been very elusive. His full name is Darius Daniel Tifft. You can find him listed in the 1860 NY census. His birthplace is listed in the census as New York. He died in Berlin, Rensselaer county, NY 14 Jan 1899. Findagrave - http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=TI...
Both D and Henry his son seem to have been rather inventive about their past and I have followed many false leads to arrive at this info. I have not found his parents. D went variously by both Darius and Daniel during his life. H did the same, sometimes he was Henry, sometimes Hudson.
This is all I have at present. Let me know if you have more.