| Birth | 1847 | Thomas Jefferson Helm was born in 1847 in Delaware County, Indiana. |
1850 Census
(with Parents)
| 6 Sep 1850 | Thomas appeared in the 1850 Federal Census of Perry, Delaware County, Indiana,in the household of his parents, Elizabeth and Jacob Helm. |
1860 Census
(with Parents)
| 24 Jul 1860 | Thomas appeared in the 1860 Federal Census of Perry, Delaware County, Indiana, as Thomas Helm, in the household of his parents, Elizabeth and Jacob Helm. He is a 11 year old female. He was born in Indiana. He attended school within the year. |
| Marriage | 31 Dec 1867 | Thomas Jefferson Helm and Mary Jane Lake, daughter of Ila Thornburg Lake and Rachel C. Current, were married on 31 Dec 1867 in Redkey, Jay County, Indiana. |
| Residence | 1880 | In 1880 Thomas Jefferson Helm lived in Indianapolis, Marion County, Indiana. |
| 1880 Census | 14 Jun 1880 | Thomas appeared in the 1880 Federal Census of Farmland, Randolph County, Indiana, as Thomas J. Helm, with his wife, Mary. Their son, Mildred, was listed as living with them, as well as a 23 year old boarder, an unknown or excluded person . He is a married white male, age 33. His occupation is railway agent. He was born in Indiana. His mother and father were born in Pennsylvania. |
| Residence | 1890 | In 1890 Thomas Jefferson Helm lived in Santa Fe, Santa Fe County, New Mexico. |
| Death | 22 Nov 1902 | He died on 22 Nov 1902 in Santa Fe, Santa Fe County, New Mexico. Cause of death: pneumonia. |
| Burial | after 22 Nov 1902 | He was buried after 22 Nov 1902 in Hillcrest Cemetery, located in Redkey, Jay County, Indiana. |
Thomas Jefferson Helm