In "Through The Years In Old Winnsboro" by Katherine Theus Obear (R.L. Bryan Co. 1940), there is a reference on pages 101-102 to Mrs. Margaret J. Shaw and her brother Frank Elder owning a store in Winnsboro in 1870. From this, I infer Mrs. Shaw's maiden name was Elder.

Mrs. Shaw's obituary in the News & Herald of 13 August, 1884:

DEATH OF MRS. SHAW- Mrs. Margaret J. Shaw, widow of the late Robert M. Shaw (sic), died in this place at an early hour on Wednesday morning. She had been in weak health for some months, suffering from disease of the heart, and for several weeks past it was known that her condition was hopeless. Mrs. Shaw was a most estimable lady, and had here a large circle of friends, who will deeply lament her death. She was in the fifty-fifth year of her age, and left two daughters- Mrs. R.M. Huey and Mrs. T. H. Ketchin. The funeral services were held in the Associate Reformed Church on Wednesday evening at six o'clock.

Note: This obituary contains an error. Mrs. Shaw was the widow of James Warnock Shaw and the mother-in-law of Robert M. Huey.

• Married: ABT 1854 ^{1 2}

1. Margaret J. Shaw b: 1854 in South Carolina
2. Henry Shaw b: 30 NOV 1855 in Winnsboro South Carolina
3. Mary Elder Shaw b: 1 FEB 1858 in Winnsboro South Carolina

1. Abbrev: GEDCOM file imported on 13 Dec 2005
   Title: GEDCOM file. Created on 12 Mar 1997. Imported on 13 Dec 2005.
2. Abbrev: GEDCOM file imported on 13 Dec 2005
   Title: GEDCOM file. Created on 13 DEC 2005. Imported on 13 Dec 2005.
3. Abbrev: 1880 Census, Fairfield County, South Carolina
   Title: 1880 Census, Fairfield County, South Carolina
4. Abbrev: Obituary, Fairfield News & Herald, 13 August, 1884
   Title: Obituary, Fairfield News & Herald, 13 August, 1884. Headstone, Bethel ARP Cemetary, Winnsboro, SCRP Cemetary, Winnsboro, SCRP Cemetary, Winnsboro, SC.