Census of 1900 - James Flack, Llano County, age 39, born November 1862 [November 1860] in Texas, lawyer, wife Kate D., sons Joe P. and Frank H., daughter Kate H.
Census of 1910 - James Flack, Llano County, age 47, born circa 1863 in Texas, lawyer, wife Kate, sons Joe P., Frank H., and James, daughter Kate H.
Census of 1920 - James Flack, Menard County, age 59, born circa 1861 in Texas, attorney, wife Kate, sons Joel P., Frank H., and James F, Jr.
FamilySearch . 19101900
23rd Legislature (1893) - Jas. Flack, postoffice Llano, nativity Texas, age 32 (born circa 1861), lawyer, 32 years in Texas, Democrat.
Texas Legislative Manual .