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.

With what, therefore, is the faith of Jesus joined?
What is the Lord able to do regarding the future?
What did this nearness of the time of restoration from captivity lead Daniel to do?
What was Christ's reply?
What does Neander say of the securing of these laws?
In what is the Christian to grow?
By what have these things been revealed to us?

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