L C Harrison moved to Indian Territory (present day Pryor Creek, Mayes County, Oklahoma) before 1900. He married Alphonso Lucinda Butler about 1895. They appear in Mayes County on the 1900, 1910, 1920, and 1930 censuses. There were no known children.

He was the Mayes County clerk for several years. In 1942, an article about his grandfather was published:
"Jonas Harrison, Legendary and Historical." [Southwestern Historical Quarterly, Vol. XLV, No. 3 by Samuel E Asbury]. There is a footnote in that article "For the Texas descendants I have been greatly aided by Mr. Lewis C. Harrison, Pryor, Oklahoma; Mrs. Sallie Hayter Harrison, Dallas, Texas; Mrs. W. O. Cloud, Henderson, Texas; Mrs. Herman Wallace, Henderson, Texas; Mrs. Kate Wheeler, Arlington, Texas; Miss Lulu Shannon, Dobbin, Texas, descendant of Jacob Shannon; and especially Mrs. C. D. Mitchell, Arlington, Texas."

Evidently there were a number of letters. Here is one marked "5th letter, Lewis C. Harrison, Box 122, Pryor, Oklahoma, July 20, 1933 -- Jonas Harrison (230)"

Pryor, Oklahoma
July 20th, 1933

Mr. Samuel E. Asbury
College Station, Texas

Dear Mr. Asbury,
I am sorry that I have delayed so long in replying to your last for I was glad indeed to get the pictures and they are appreciated more than you can imagine. Am sending by registered mail a picture of Father and Mother, the only one I have.
Grand mother told me that father resembled his father more than any of her children. He was tall, large bone but lean, black hair, gray eyes, red whiskers, awfully freckled.
I have some history you don't appear to have (ie) Grandparents moved from Georgia in company with another family by the name of Irons all horseback with all their belongings on a packhorse - crossed the Sabine into Texas on December 24th, 1819. Settled on a Creek now Irons Creek Harrison County, lived there a year or so and moved to Shelby County where they continued to live until his death.
He was a great hunter and very expert with the flint lock long rifle somehow I am under the impression his death was the effect of a snake bite. I have the story but am not sure that it was Grandfather.
I hope you will excuse me this time for the long delay in answering. It was not neglect.
Very truly yours
L. C. Harrison