— born in Georgia, either Murray Co., GA, or Whitfield Co., GA:
4.  Milburn / Wilborn Jabez GALT, b. 27 Jan 1852
5.  James Edward GALT, b. 3 Sep 1855
6.  Lewis Leland B. "Lee" GALT, b. 11 Oct 1858
7.  Elizabeth Machen "Bessie" GALT, b. 21 Aug 1865

1.  Jordan R. Dodd, ed.  1993.  Georgia Marriages: Early to 1850.  Liahona Research, Orem, UT (Broderbund CD-226):

Galt, Edward M.

Mcghee, Elizabeth

1 Jul 1845

Murray Co.

2.  1850 Census Index/Images (online at Ancestry.com; Image #205 of 299):  District 63, Murray Co., GA, p. 248?B, Roll M432_78, 1391/1391, enumerated 6 Nov 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):

Edward Galt	30	M		Merchant????	10000	SC
Elizabeth "	26	F				Tenn
Margaret  "	4	F				Ga
John F    "	2	M				do
Mary      "	1	F				do
Nancy Bishop	17	M		Laborer		NC
John Stewart	25	M		do		SC
Lewis Meweland?	21	M		do		France
Frank Vaugnberg?	25	M		Cabinet workman?		Germany

This record was difficult to read, and I must admit that I didn't try very hard to decipher the occupations or foreign-born laborers.

2.  1860 Census Index/Images (online at Ancestry.com, Image #87 of 211):  Dalton P.O., Dalton Dist., Whitfield Co., GA, p. 599, PN 86/599,  622/619, enumerated 12 Jul 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):

E M Galt	40	M		Bap M & Farmer			SC
Elizabeth "	37	F					Tenn
Margaret  "	14	F					Ga
Mary C    "	11	F					"
John      "	13	M					"
Milburn   "	8	M					"
James E   "	4	M					"
Lewis L B "	2	M					"
Mary McGee	83	F					"
Henrietta Galt	13	F					"
David Griffin	19	M	M	Day Laborer			"
Benjamin	16	M	M	"     "			"

Mary McGEE is likely Elizabeth's mother or grandmother.  Henrietta is their niece, whose mother (wife of John Ridge GALT) recently died.

3.  WorldConnect / Ancestry World Trees (online at RootsWeb.com/Ancestry.com).