At 8th level, the cavalier gains the ability to read scrolls and cast arcane or divine spells from a scroll as if he had a caster level of his cavalier level –4. He can decipher all scrolls, using his Linguistics skill in place of Spellcraft, and does not need to cast read magic in order to decipher a scroll. Which type of spell the cavalier can cast is based on the Knowledge skill he chose for specialized knowledge. If he chose Knowledge (arcana), he can cast any arcane spells from a scroll. If he chose Knowledge (religion), he can cast any divine spells from a scroll. Furthermore, he gains a +1 bonus to an ability score for purposes of determining the level of spells he can cast from a scroll, and this bonus increases by +1 at 10th level and every 5 levels thereafter (to a maximum of +4 at 20th level). The ability score that gains the bonus is dependent on which skill the cavalier picked for his specialized knowledge ability. If the cavalier picked Knowledge (arcana), he gains the bonus to Intelligence. If he picked Knowledge (religion), he gains the bonus to Wisdom.
