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.

How was Christ to be received by His own people?
After Herod's death, where did Joseph and his family live?
When, according to prophecy, were men to amass great wealth?
What is said of those embraced in the first resurrection?
When did David say he would be satisfied?
With what announcement does the sixth trumpet close?
While suffering in the garden of Gethsemane, how was Christ strengthened?

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