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.

In the visions of John, what interpretation is given to the woman who sat upon many waters?
How many lawgivers are there?
Who first enjoined Sunday-keeping by law?
3. According to the prophecy, how long was the power represented by the little horn, or papal Rome, to persecute the saints?
What takes place at the sounding of the trumpet?
What was given these martyrs?
For what did Job say he would wait after death?

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