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.

Is mere assent to divine truth sufficient?
How was He treated?
Whose Spirit inspired their utterances?
When the he goat \"was strong,\" what occurred?
12. What universal boycott is to be employed, in an attempt to compel all to receive the mark of the beast?
What requirement was made by these teachers from Judea concerning the ceremonial law?
8. Did God bless and sanctify the seventh day while He was resting upon it, or when His rest on that day was past?

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