How early was this sacrificial system known?

Answer

"By faith Abel offered unto God a more excellent sacrifice than Cain, by which he obtained witness that he
was righteous, God testifying of his gifts." Heb. 11: 4. See Gen. 4: 3-5; 8: 20.

By what name are the sacred writings of the Bible commonly known?
What is the only unpardonable sin?
What answer was addressed to Daniel?
Of what else does God say He gave the Sabbath to His people to be a sign, or reminder?
Still bent on persecution, how does Satan manifest his enmity against the remnant church?
Have we reached the time when there is \"distress of nations, with perplexity\"?
How does Satan deceive the people?

Questions & Answers are from the book Bible Readings for the Home Circle