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.

When and by what means will the effects of sin be removed?
What warning is therefore given?
Was it God's design that all should possess the same gifts?
Is any of this kind of work to be done on the Sabbath?
When was the papal head of the first beast of Revelation 13 wounded?
Will this he a time of judgment?
What name is given to the second state of the church?

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