Your post is very interesting. I don't have any info on a William D. Carrier in Sullivan county old enough to be a Rev. War soldier. However. W. John Carrier and Jemima Nichols supposedly had a son named William born about 1768, but that is all I have.In the 1830 Sullivan census only two Carrier are listed John and Jonathan whom I assume to be brothers and sons of W. John Carrier Jr. and Mary Morrell.In the 1837 tax list two William Carriers are listed in the 3rd District (Hickory Tree area) of Sullivan County . In the 1840 census William D. is listed born between 1800 and 1810 and his spouse born between 1810 and 1820.In the 1850 census William D. age 42 and Mahala age 36 with children Washington (16) Luina (13) John(8) James (6) Alvin(4) Eliza (2) Fleming (5).The other William Carrier in the 1837 tax list is probably William M. also listed in the 1850 census. In the 1860 census this family is listed with 4 more children Martha E. (9) Amanda E. (7) Louisa E. (5) and George F. (2 mo).My working assumption has been these two Williams are first cousins and sons of John and Jonathan Carrier although which William goes with which John I am unsure.If you have any thoughts please EMail thoams.carrier @ usa.net. I am particularly interested in William D. rev. soldier info.