* '''15''' - [[Christopher Paolini]] writes the first draft of his [[Eragon]] trilogy which is published when he is 19.
* '''16''' - Jean-François Champollion, can speak a dozen languages and delivers a paper on the Coptic language to the Grenoble Academy. By 20, he can speak another 13 languages and at 32 he deciphers the [[Rosetta Stone]].
* '''18''' - [[Mary Shelley]] writes Frankenstein (The Modern Prometheus) - it is only published when she is 21, however.
* '''19''' - Captain Albert Ball, [[VC]], MC, DSO & 2 bars, commences his career as a fighter pilot. By the time he is killed, aged 20, in 1917, he has become one of the [[First World War]]'s greatest air aces, accounting for at least 44 [[German]] aircraft.