Mary Poston Welch referred your inquiry to me to see if I could help.
I have looked for the names John L. HUGGINS and Isabella POSTON/POLSTON in my books and database and found nothing in any year range. I didn't find any male Huggins-female Poston marriages.
In SC (but none in the Chesterfield Co. area) there are Poston-Huggins marriages in my particular line, as follows:
Fenrick POSTON b. June 03, 1871 d. January 21, 1934 m. Addie Aliene HUGGINS b. October 11, 1883 d. February 21, 1922
Simon Gary POSTON b. July 05, 1881 d. January 03, 1958 m. Wilna Capitola HUGGINS b. November 10, 1894 d. April 16, 1994
Samuel Huggins POSTON b. August 05, 1908 d. May 04, 1960 m. Vera Lou Miller HUGGINS b. July 22, 1907 d. May 27, 1994
Sorry there wasn't more help for you...