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 did Christ indicate as essential to eternal life?
How was the conquest of Medo-Persia by Grecia foretold in this symbolic prophecy?
What were these stones to commemorate?
What is one thing for which God has given the Sabbath to he a sign?
On opening the fifth seal, what was seen under the altar?
15. Were there to he no resurrection of the dead, what would be the condition of those fallen asleep in Christ?
In what scripture are Christians recognized as Israel?

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