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 is God ready to do for all who seek forgiveness?
What tender, filial regard did Christ manifest for His mother in the hour of His death?
How was the fourth kingdom represented?
How many are included in the \"all\" who have sinned?
What did He thus abolish?
How important is it that we know God?
What description does the prophet Jeremiah give of the earth during this time?

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