Linda--
Have just started working on the James E. Fox family who connects to my McWilliams family through our Aunt Pearl who married William Perry McWilliams. Pearl was a sister of Ada Fox who married Ezra Rich. Would love to share information with you. Here's the census records I've found on James & Lucy (Slaughter) Fox's family:
1900 Monroe County, Kentucky, Gamaliel Precinct/8th Magistrate District, ED 87, 19 June 1900, pg. 237A/12A (image 24):
204/206 Fox, Daniel, head, w, m, Nov 1842, 57, m/37, TN,VA,TN, Farmer
Mary J., wife, w, f, Jun 1846, 54, m/37, 12 children/9 living, KY,KY,KY
Jarat B., son, w, m, Aug 1884, 15, single, KY,KY,KY, Farm laborer
Samuel P., son, w, m, Jan 1887, 13, single, KY,TN,KY, Farm laborer
205/207 Fox, Claybourn B., head, w, m, July 1882, 17, m/0, KY,TN,KY, Farmer
Mary E., wife, w, f, , Jan 1884, 16, m/0, 0 children, KY,KY,KY
206/208 Fox, James E., head, w, m, Oct 1874, 20, m/5, IY,TN,KY, Farmer
Lucy, wife, w, f, Sept 1878, 21, m/5, 2 children/2 living, KY,KY,KY
Luvie G.,D Son(?), w, m, May 1896, 4, single, KY,KY,KY
Ada C., dau, w, f, Setp 1898, 1 single, KY,KY,KY

1910 Monroe County, Kentucky, Gamaliel/Mag Precinct 8, ED 163 23 & 25 April 1910, pg. 140A/5A (image 9):
81/93 Fox, J.E., head, m, w, 35, m1/15, KY,TN,KY, Farmer/Gen Farm
Lucy, wife, f, w, 30, m1/15, 5 children/5 living, KY,TN,KY
Lovie, dau, f, w, 14, single, KY,KY,KY, Farm Laborer
Ada, dau, f, w, 12, single, KY,KY,KY
Lonie, son, m, w, 9, single, KY,KY,KY
Ovie, dau, f, w, 6, single, KY,KY,KY
Pearlie, dau, f, w, 3, single, KY,KY,KY

82/94 Fox, S.P., head, m, w, 22, m1/2, KY,TN,KY, Farmer
L.J., wife, f, w, 19, m1/2, 2 children/1 living, KY,KY,KY
Briel(?), son, m, w, 2/12(?), single, KY,KY,KY

83/95 Fox, J.B., head, m, w, 22, m1/3, 1 child/1 living, KY,TN,KY, Farmer
Mary, wife, f, w, 22, m1/3, 1 child/1 living, KY,KY,KY
Icyree(?), dau, f, w, 2, single, KY,KY,KY
Fox, Mary J., mother, f, w, 65, wd, KY,KY,KY
Note: This appears to be James and Lucy with Pearl--next families are brothers of James and J.B. is perhaps Jaret from the 1900 census; their mother Lucy is a widow and living with him.

1920 Dickens County, Texas, Justice Precinct 1/Dickens, ED 55, 8 March 1920, pg. 140A-B/3A-b (image 5 &6):
43/55 Fox, James E., head, owns/free, m, w, 43, married, reads/writes, KY,TN,KY, Farmer
Lucy, wife, f, w, 40, married, reads/writes, KY,TN,KY
Louie(?), son, m, w, 23, single, reads/writes, KY,KY,KY, Farm laborer
Louie(?) son, m, w, 18, single, reads/writesKY,KY,KY, Farm laborer
pg. 140B Ovie, dau, f, w, 16 single, reads/writes, KY,KY,KY, Farm laborer
Pearl, dau, f, w, 12, single, in school/reads/writes, KY,KY,KY, Farm laborer
43/56 Rich,Ezra, head, rents, m, w, 26, married, reads/writes, KY,KY,KY, Farm laborer
Addie(?), wife, f, w, 21, married, reads/writes, KY,KY,KY
Cleo(?), dau, f, w, 1 7/12(?), single, TX,KY,KY

1930 Lamb County, Texas, Precinct 5, ED 10, April 13, 1930, pg. 145B/5B(image 10):
87/90 Fox, Lucy L., head, owns, f, w, 50, wd, KY,KY,KY, Farmer
Lor??? D., son, m, w, 28, single, KY,KY,KY, Farm Laborer

I believe Daniel Fox was the father of James E.; grandfather of Ada and Pearl.