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.

How, according to prophecy, was Christ to conduct Himself when on trial?
How does godly sorrow for sin manifest itself?
How was He treated?
9. What testimony did the Apostle Peter bear concerning his experience on the mount of transfiguration?
How is the law further described?
What is said concerning the captivity and downfall of the Papacy?
When Christ sent out the seventy, what did He tell them to do in the cities whither they went?

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