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 great truth was then stated?
1. Immediately after the vision of Daniel 8, what did Daniel learn from his study of the prophecy of Jeremiah?
What specifications of \"the man of sin\" are thus fully met?
What blessing does the Psalmist say attends the keeping of God's commandments?
How did this change in observance of days come about, suddenly or gradually?
What accompanies the earthquake?
What is the last enemy to be destroyed?

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