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 whom were the heaven and the earth created?
What effect did the preaching of the apostles have upon the hearers?
What immediately followed this complete apostasy?
What was the song of Moses?
By what title does the Psalmist address God?
How did man lose his dominion?
What peaceful condition will reign throughout the earth then?

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