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 there to be a special message for the last days?
What question did -Christ's wonderful teaching call forth?
What is the nature of Gods law?
How did Christ treat His Father's commandments?
When and by whom was the Sabbath made?
What is the chief occupation of Satan and his angels?
When expiring on the cross, what did Christ say?

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