Why does frederick call mr. auld’s forbidding his learning how to read “invaluable instruction? ”

Because he unwittingly gives him the key to mental freedom, at a moment Frederick states "if you teach that black person (speaking of myself) how to read, there would be no keeping him. It would forever unfit him to be a slave." Once he knew the world that Mrs. Auld taught him, it was imposible for him to be satisfied being a slave.

regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.

lancelot said to the beautiful ellen i c u r a b u t l n (i see you are a beauty lancelot was the greatest and worst of the knights who became the king's champion and undertook quests in the king's name. he became the adulterous lover of queen guinevere, and they had a son named galahad.