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 place was Christ taken?
How are these gifts elsewhere spoken of?
What sign was to follow the darkening of the sun and the moon?
Did angels exist before the death of any of the human family?
What is promised those who add grace to grace?
How perfect does Christ tell us to be?
Why does Christ desire this growth in His followers?

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