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.

BY what union does Christ reconcile both Jew and Gen. tile to God through the cross?
What does Christ declare Himself to be?
5. After the healing of the blind man, upon what charge did some of the Pharisees seek to prove that Christ was not of God?
Against what are husbands cautioned?
By what is Grecia, the kingdom succeeding Medo-Persia, represented in the image?
Is there a specified time for the cleansing of the heavenly sanctuary?
What did He say should be done with every plant not planted by God?

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