Hi Cathy – I am helping Bill and John research the Harrells with matching DNA.  My great grandmother was a Harrell.  I saw your Grandpa Merton listed as Murton Dtain Aldafee in the 1910 Marshall Co., IN census.  So I assumed he was the son of Clara Ruth Harrell and William Alonzo Alderfer.  I will make this change.  I am sorry I have nothing regarding Bulber Dunnell, etc.  Good luck with your research!    Hazel