Found recently in the Library of Virginia online catalogue a reference to two Adair obituaries from the "Richmond Enquirer."
"Adair, Herbert, place of residence at time of death:Monroe County, Virginia, publication date December 22, 1848, page 2, column 6."
"Adair, William, Rev., place of residence at time of death:Monroe County, Virginia, publication date January 5, 1849, page 2, column 7."
Herbert Adair's obit I found on microfilm at Cornell (microfilm #2405):
"Died, on Friday morning, Dec. 8th, at her late residence "Happy Retreat," near Union, Monroe County, Virginia, Mrs. Herbert Adair, consort of Rev. Wiliam Adair, in the 93rd year of her age.For more than sixty years this most estimable woman was a regular and consistent member of the Presbyterian Church, illustrating and adorning, in all her relations in life, the religion she professed.Devoted to her husband, kind to her neighbors, hospitable to strangers, beloved by her servants, obedient to her God, her best eulogy is her long life.May the aged husband be comforted and consoled by the reflection, that when her cup of bliss was emptied of its contents here, a kind God summoned her to a holier and higher felicity. B."
Cornell does not have the microfilm for the 1849 "Richmond Enquirer," so I was unable to find Rev. William Adair's obit.Perhaps just as well, since it is pretty clear from multiple sources that Rev. Adair's wife's name was Ellen or Eleanor, not Herbert.The date of her death (Dec. 8, 1848), agrees with other sources.Maybe the "Richmond Enquirer" proof-reader was off-duty in December of 1848.