While researching my mother's line (Williams), I ran across HISTORY OF HARRIS COUNTY GA, 1827-1961 by Louise Calhoun Barfield, 1961. There are several Forts mentioned, though none directly in my line. I thought I'd jot them down for the benefit of any other Fort researchers. I hope this helps someone, sometime. See my further notes at the end.
Tom Fort

Page 35: RFD Carriers
Hamilton Rt. 4 Feb 2, 1903 James E. Fort

Page 71: Marriages 1859
December 19 -- Thomas L. Forte and Laura F. Evans

Page 214: Harris Co. Representatives (to Ga. Legislature)
1898-99 Robert E. Fort
1900-01 Robert E. Fort

Page 223: Tax Receivers
1877 R. E. Fort
1893 R. E. Fort

Page 226: Superior Court Judge, Chattahooche Circuit
Tenure Judge
9-24-1942 to 12-13-1956 T. Hicks Fort

Page 235: Persons congratulating the "Harris County Journal" in its 70th Anniversary Edition in 1939 included R. B. Fort

Page 272: District Education Trustees in 1886 Valley Plains District -- R. E. Fort

Page 303: Confederate Veterans, Book Pension Roll, Harris County Book 234, Disabled or Invalid Soldiers Roll Fort, R. E., Co. I, 46 Ga., 3-4-1862. Age

Page 305: List of Confederate Veterans buried in Hamilton Cemetary Robert Fort

Page 408: Chipley Cemetery
Infant Mamie Fort, b. 12-20-1902

Page 412: Bethany Baptist Church Cemetery (West of Chipley) James E. Fort, Jr., b 10-4-1909, d 6-28-1910

Page 448: Photo of Confederate Veterans made in front of court house on the square in Hamilton, Ga Robert E. Fort

Page 458: Plans for new Hamilton Methodist Church, 1926 Board of Stewards: R. B. Fort

Page 494: Robert Bridges Fort
ROBERT BRIDGES FORT
(Family Record by Mary Fort, Hamilton, Ga.) Robert Emmett Fort, son of Miranda Fort and Elizabeth Stanford Fort, was born August 12, 1840, and died December 22, 1918. He was married to Martha Elizabeth Bridges (b.9-12-1847, d.4-5-1928) on December 3, 1867.
Their children:
Lillie Dean Fort (b. Oct. 9, 1868, d. May, 1924), m. William Greer.
Their children:
James Robert Greer,
Fort Greer,
Harmon Greer,
Betty Greer,
Martha Greer,
Calvin Greer,
Jesse Greer,
Lillie Greer.
Robert Bridges Fort (b. Jan. 23, 1871, d. July 19, 1957), m. Mary B. Phillips.
Their children:
Edna Earl Fort,
Raymond Woodfin Fort,
Mary Katherine Fort,
Robert Bridges Fort; Jr.,
Willie Miranda Fort (b. Oct. 8, 1874, d. Sept. 5, 1941).
James Emmett Fort (b. Sept. 4, 1878, d. Jan. 27, 1946), m. Ozella Jenkins.
Their children:
James Emmett Fort, Jr., b 10-4-1909, d 6-28-1910
Julia Elizabeth Fort,
Ida Jean Fort.
Jefferson Burch Fort (b. Sept. 27, 1882, d. April 4, 1943), m. Jessie Williams.
Their children:
Dorothy Fort,
Martha Ella Fort,
India Fort,
Charles Roy Fort.
Roy Woodfin Fort (b. Sept. 17, 1890, d. July 13, 1912).

Page 498: Hamilton Cemetary
Martha Bridges Fort b.9-12-1847 d.4-5-1928
Roy W. Fort b.9-17-1890 d.7-13-1912
Robert Fort b.8-12-1840 d.12-22-1896
James Emmett Fort b.9-4-1878 d.1-27-1946
Robert Bridges Fort b.1-23-1871 d.7-19-1957

Page 513: Harris Housing Authority
Elizabeth Fort

Page 616: W. P. Bridges
W. P. BRIDGES
(Family Record by Mrs. W. O. Smith. Columbus, Ga.) W. P. Bridges, Methodist, farmer, m. Lucy Elandor Fort (dau. of Miranda and Elizabeth (Fort) Bridges) b. 7-22-1127, d. 11-9-1878. Both were members of the Bethel Methodist Church of Pine Mountain Valley.
Their children:
Nathaniel Bailey Bridges b. 5-20-1869.
Lizize Naomi Bridges b. 7-3-1871.
Mattie Fort Bridges b. 8-11-1873.
Lillie Elandor Bridges b. 2-3-1876.
Kate Bridges b. 12-12-1881. the dau. of W. P. and Ira James Bridges.

Page 705: White Family of Whitesville
...land is ownned today by Mrs. J. B. Fort of Whitesville.
Page 706:
The White Cemetery is across the road from Mrs. J.B. Fort's home.

Page 719: John Golightly Andrews
(Children of Dr. Charles Williams and 3rd wife Ella Patillo) Mrs. Jesse W. Fort

Page 728: Mrs. Jessie Williams Fort
MRS. JESSIE WILLIAMS FORT (Family Record by Mrs. J. B. Fort) J. [Jefferson] Burch Fort, son of Robert Fort and Martha Elizabeth (Bridges) Fort, m. Jessie Williams, dau. of L. O. Williams and Etta Pattillo.
Their children:
Dorothy Fort unm.
Martha Fort m. Linton Washington.
Issue: Helen, Nancy, Larry.
India Fort m. Henry Cook.
Issue: Marie, Charles, Betty. Robert Fort unm.

REMINISCENCES OF Mrs. J. B. Fort
Mountain Creek Baptist Church was organized in 1829 in the home of Rev. J. W. Cooper. It was located across the road from the home of Mrs. Fort and south of the White Cemetery and north of the Mountain Creek in which many of the early members were baptized. A cemetery of a few of the slaves is marked only by field rocks.
The property is owned today by E. L. Truett (Lot 282—20 District).

The White Farm Land
The Fort farm passed through many hands, as the early deeds of Mrs. Fort indicated. Among owners have been the Cooper family, the White family, and her father, 0. L. Williams, who gave the place to Mrs. Fort. She loves it with all of its history. Many landmarks and sites of nearby Whitesville have passed away. Few people remember where they stood.

[Further Notes from Tom Fort, 10-9-2004]
Several trees on the internet have the father of Robert Emmett Fort, Miranda Fort as having been born 28 Nov 1806 in Milledgeville, Putnam County, Georgia. [Note: Milledgeville is in Baldwin County, borders Putnam on the south.] Others have the same date with a birthplace of Virginia. There are trees that have Miranda as son of the Edwin Edward Fort ("A Family Called Fort", p30) that married Lucy Lane of Brunswick County, Va and "may have moved to Hancock County, Ga." about 1810. Hancock County borders both Baldwin and Putnam on the east.