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 does grace, as the ground of justification, exclude righteousness by works?
How much was included in the gift of Christ for the salvation of man?
4. After Daniel and his fellows had sought God earnest1y, how were the dream and its interpretation revealed to Daniel?
What is said concerning the captivity and downfall of the Papacy?
What plain proposition did he submit to all Israel?
What will be the first plague, and upon whom will it fall?
10. Under what illustration from nature are the resurrection and the final salvation of the righteous taught?

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