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.

Will sin and its evil results ever appear again?
To whom does the \"seed\" in these promises refer?
What are we exhorted by, the prophet to seek?
How extensively is this message to he proclaimed?
How are the people described who are developed by the threefold message here referred to?
By what means were the apostles delivered from prison?
Of whom does the Bible teach that God is a rewarder?

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