It's important to remember that Rizal's literary output started young, and many of his early poems were lost or never officially documented.
If you're interested in exploring his early works, you could research some of his known poems from his Ateneo period, such as:
* "Mi Primera Inspiración" (My First Inspiration)
* "A La Juventud Filipina" (To the Filipino Youth)
* "El Canto del Viajero" (The Song of the Traveler)
These poems reflect Rizal's early thoughts on love, patriotism, and the plight of the Filipino people. While these poems might not be from his 15th year, they offer valuable insights into the budding genius of the young Rizal.