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.

To what insults was Christ subjected at the house of the high priest?
Where was Daniel at this time?
How does God regard those who walk in His law?
25. Since the Sunday Sabbath originated with the Roman power (the beast), to whom will men yield deference to compulsory Sunday laws?
Where did John, in vision, see the saints?
How were their prayers answered?
12. When the woman of Canaan came to Christ, beseeching Him to heal her daughter, what did He say?

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