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 what one word is the character of God expressed?
Through whom are we reconciled to God?
In view of the judgment, what exhortation is given?
In what words had the prophet Daniel foretold this?
What was to occur under the fourth trumpet?
How does the Lord regard kindness shown to the poor?
Of what are the streets of the city composed?

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