"and in him broods already a taste for mindless violence"
Mars and his children (c. 1480)
Public DomainMars and his children (c. 1480) - Credit: Mittelalterliches Hausbuch von Schloss Wolfegg
Mars (with Scorpio bottom-right), from The Seven Planets with the Signs of the Zodiac (1539)
Public DomainMars (with Scorpio bottom-right), from The Seven Planets with the Signs of the Zodiac (1539) - Credit: Hans Sebald Beham

A birth during the Leonid storm of 1833 (see bookmark p.3 'Night of your birth.') would have been on a date about 12 November, making the astrological sign under which the kid was born Scorpio.

Scorpio is ruled by Mars, named after the Roman god of war and associated with violence. This astrological configuration likely informs the kid's 'taste for mindless violence'.