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.

Is mere assent to divine truth sufficient?
What will be the experience of those born of the Spirit ?
What blessed assurance is given all believers in Christ?
What relation does a justified person sustain to the law?
12. Do Catholic authorities acknowledge that there is no command in the Bible, for the sanctification of Sunday?
What were to be the signs on earth of Christ's coming?
In bereavement, like whom should we not sorrow?

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