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 prophetic declaration foretold this truth?
What is the Lord able to do regarding the future?
6. What did God, through the prophet Daniel, say the power represented by the 9ittle horn\" would think to do?
Do Protestant writers acknowledge the same?
To whom does the Sabbath belong?
Following the signs of His coming, what did Christ say would take place?
What are we admonished not to do?

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