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 effect did the preaching of the apostles have upon the hearers?
What place has the Sabbath in the work of salvation?
When was this time of reformation?
What did Christ tell the rich young man to do?
What scripture indicates that each child of God has an accompanying angel?
12. What class of God's servants have evil angels, through wicked men, seemed to make special objects of attack?
What is our duty toward the outcast and wandering?

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