. . . . . . "Student"@en . . . "Thomas \"Tad\" Lincoln (April 4, 1853 - July 15, 1871) was the fourth and youngest son of Abraham and Mary Lincoln. He lived with his mother after his father was assassinated. He died abruptly at the age of 18 on July 15, 1871, presumably of tuberculosis."@en . . "Edward Lincoln"@en . "How Few Remain"@en . . . "1871"^^ . "c. 1863"@en . . "Natural Causes"@en . . . "Thomas \"Tad\" Lincoln (April 4, 1853 - July 15, 1871) was the fourth and youngest son of Abraham and Mary Lincoln. He lived with his mother after his father was assassinated. He died abruptly at the age of 18 on July 15, 1871, presumably of tuberculosis."@en . . "Tad Lincoln"@en . "Tad Lincoln"@en . "Abraham and Mary Lincoln"@en . . . . "Willie Lincoln"@en . "Posthumous reference"@en . "1853"^^ . "Probably tuberculosis"@en . .