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.

What was offered Christ at His crucifixion?
Through whom was a restoration of the lost dominion promised to Abraham?
What did the devout Simeon say when he saw the child Jesus?
What does the fifth commandment require of children?
21. What miraculous event occurred at the death of Christ, signifying that the sacrificial system was for ever at an end ?
How many will see Him when He comes?
What is the last enemy to be destroyed?

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